服用SGLT2抑制剂（如恩格列净）的患者，为什么可能在血糖正常或仅轻度升高的情况下发生酮症酸中毒？
Why can a patient taking an SGLT2 inhibitor such as empagliflozin develop ketoacidosis while glucose is normal or only mildly elevated?
此类药物经尿液排糖以降血糖，同时降低胰岛素需求、升高胰高血糖素，并因渗透性利尿造成容量不足，共同促进脂肪分解与肝脏生酮；叠加进食减少、手术或感染等诱因，明显酮症可在血糖正常时发生，即血糖正常型DKA。因血糖不高而易被漏诊延误，一旦怀疑应立即停药，即使血糖不升高也需静脉补糖并用胰岛素纠正酮症。
These drugs clear glucose through the urine to lower blood sugar, while reducing insulin demand, raising glucagon and causing osmotic diuretic-driven volume depletion; together these effects accelerate lipolysis and hepatic ketogenesis. With precipitants such as poor intake, surgery or infection, frank ketoacidosis can emerge despite normal glucose: euglycemic DKA. Because the unremarkable glucose delays recognition, stop the drug whenever suspected and treat with intravenous dextrose plus insulin even when glucose is not elevated.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
Peters AL 等，《Euglycemic diabetic ketoacidosis: a potential complication of treatment with sodium-glucose cotransporter 2 inhibitors》，Diabetes Care，2015年，第38卷第9期，DOI: 10.2337/dc15-0843
Peters AL et al. Euglycemic Diabetic Ketoacidosis: A Potential Complication of Treatment With Sodium-Glucose Cotransporter 2 Inhibitors. Diabetes Care, 2015, 38(9). DOI: 10.2337/dc15-0843
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.2337/dc15-0843：Euglycemic Diabetic Ketoac
#糖尿病酮症酸中毒 #SGLT2抑制剂 #内分泌急症
痛风为什么和尿酸有关？
Why is gout linked to uric acid?
尿酸是嘌呤代谢的终产物，当血中尿酸长期过高、超过溶解度时，会在关节和周围组织析出尿酸钠结晶。结晶被免疫细胞识别后激活NLRP3炎症小体，释放大量白细胞介素-1β，引发剧烈的红、肿、热、痛，最常见于第一跖趾关节。急性期以抗炎止痛为主，长期需要降尿酸药物达标治疗，并限制酒精（尤其啤酒）、动物内脏和含糖饮料。
Uric acid is the end product of purine metabolism, and when blood levels stay above its solubility limit, monosodium urate crystals precipitate in joints and surrounding tissue. Immune cells sense these crystals and activate the NLRP3 inflammasome, releasing large amounts of interleukin-1beta and producing intense redness, swelling, heat and pain, classically at the base of the big toe. Acute attacks are treated with anti-inflammatory drugs, while long-term care means urate-lowering therapy to a target level plus limiting alcohol (especially beer), organ meats and sugary drinks.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Harrison's Principles of Internal Medicine 第20版,McGraw-Hill,2018
J. Loscalzo et al., Harrison's Principles of Internal Medicine, 20th ed., McGraw-Hill, 2018
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY ISBN 标识 9781259644047（按标识回读: Harrison's prin
#痛风 #尿酸 #尿酸钠结晶 #炎症小体
1 型糖尿病和 2 型糖尿病的根本区别在哪里？
What is the fundamental difference between type 1 and type 2 diabetes?
1 型是自身免疫破坏胰岛 β 细胞，几乎不分泌胰岛素，多发于青少年，须终身注射。2 型主要是胰岛素抵抗伴随分泌相对不足，与肥胖和生活方式相关，早期可经饮食运动甚至口服药控制。
Type 1 is autoimmune destruction of pancreatic beta cells with almost no insulin secretion, usually starting young and requiring lifelong injections. Type 2 is mainly insulin resistance with relative deficiency, linked to obesity and lifestyle, often managed early by diet, exercise, or oral drugs.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
美国糖尿病协会(ADA)《糖尿病医学诊疗标准》(每年更新)；美国 NIDDK《糖尿病总览》
American Diabetes Association (ADA), 'Standards of Medical Care in Diabetes' (annual); US NIDDK, 'Diabetes Overview'
#1型 #2型 #胰岛素抵抗 #β细胞
甲状腺是怎样调控全身代谢速率的？
How does the thyroid regulate the body's metabolic rate?
甲状腺分泌 T3、T4 激素，经下丘脑—垂体—甲状腺轴调控，进入细胞后提升基础代谢、产热和心率。分泌过多会心慌消瘦（甲亢），过少则乏力怕冷（甲减）。
The thyroid secretes T3 and T4 under hypothalamic-pituitary-thyroid control; these hormones enter cells and raise basal metabolism, heat production, and heart rate. Over-secretion causes hyperthyroid palpitations and weight loss, under-secretion causes hypothyroid sluggishness.
难度 进阶 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
美国国立糖尿病消化肾脏病研究所(NIDDK)《甲状腺疾病》；De Groot 等《甲状腺与代谢》
US NIDDK, 'Thyroid Disease'; De Groot et al., 'The Thyroid and Its Diseases'
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL2954942W：The thyroid and its dis
#甲状腺 #T3 #T4 #下丘脑-垂体轴
胰岛素是怎样被发现的，为什么它能挽救糖尿病患者？
How was insulin discovered, and why does it save diabetics?
Banting 与 Best 在 1921 年从狗的胰岛提取物中分离出能降低血糖的物质，命名为胰岛素。1 型糖尿病患者自身无法分泌胰岛素，外源补充可维持血糖、避免酮症酸中毒和死亡。
Banting and Best isolated a blood-sugar-lowering substance from pancreatic islets in 1921 and named it insulin. Type 1 diabetics cannot make their own, so external insulin maintains glucose and prevents fatal ketoacidosis.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录含书名，但缺版次 / 出版社 / 年份中的一部分，需编辑补全后才能做独立比对。
Banting 与 Best《胰岛提取物与糖尿病》(J Lab Clin Med, 1922)；美国糖尿病协会(ADA)；美国 NIDDK
Banting & Best, 'Pancreatic extracts in diabetes' (J Lab Clin Med, 1922); American Diabetes Association (ADA); US NIDDK
#胰岛素 #Banting #血糖 #1型糖尿病
维生素 D 在身体里到底扮演什么角色？
What role does vitamin D actually play in the body?
维生素 D 经日晒在皮肤合成、再于肝肾活化，主要促进肠道钙磷吸收以维护骨骼；它还参与免疫调节和肌肉功能。缺乏会导致儿童佝偻病、成人骨软化。
Vitamin D is made in skin by sunlight and activated in liver and kidney; its main job is promoting intestinal calcium and phosphate absorption to build bone, while also aiding immune regulation and muscle function. Deficiency causes rickets in children and osteomalacia in adults.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录含书名，但缺版次 / 出版社 / 年份中的一部分，需编辑补全后才能做独立比对。
美国国立卫生研究院(NIH)膳食补充剂办公室《维生素 D 事实清单》(2021)；Holick《维生素 D 与健康》(NEJM, 2007)
US NIH Office of Dietary Supplements, 'Vitamin D' Fact Sheet (2021); Holick, 'Vitamin D and health' (NEJM, 2007)
#维生素D #钙吸收 #骨骼 #日照合成
甲状腺功能亢进和减退有什么不同表现？
How do hyperthyroidism and hypothyroidism differ in presentation?
甲亢（甲状腺激素过多）表现为心悸、怕热、消瘦、易激动；甲减（激素不足）表现为乏力、怕冷、体重增加、嗜睡。二者均需化验甲功并遵医嘱用药。
Hyperthyroidism (too much thyroid hormone) shows as palpitations, heat intolerance, weight loss, and irritability; hypothyroidism (too little) shows as fatigue, cold intolerance, weight gain, and sluggishness. Both need thyroid-function tests and prescribed treatment.
难度 进阶 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Harrison's Principles of Internal Medicine 第20版,McGraw-Hill,2018
J. Loscalzo et al., Harrison's Principles of Internal Medicine, 20th ed., McGraw-Hill, 2018
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY ISBN 标识 9781259644047（按标识回读: Harrison's prin
#甲状腺 #甲亢 #甲减 #内分泌
为什么女性绝经后骨质疏松明显增多？
Why does osteoporosis increase sharply after menopause?
雌激素能抑制破骨细胞活性、维持骨吸收与骨形成的平衡。绝经后雌激素骤降，骨吸收超过骨形成，最初几年骨量流失最快，骨小梁变稀疏，脊椎和髋部骨折风险显著上升。预防要点是从年轻起积累骨峰值：足量钙和维生素D、负重与抗阻运动、戒烟限酒；高危者可做骨密度检查并在医生指导下用抗骨吸收药物。
Oestrogen restrains osteoclast activity and keeps bone resorption and formation in balance. After menopause oestrogen falls abruptly, resorption outpaces formation, bone is lost fastest in the first few years, trabeculae thin out and the risk of spine and hip fracture climbs. Prevention means building peak bone mass early - enough calcium and vitamin D, weight-bearing and resistance exercise, no smoking and limited alcohol - while high-risk women can have bone density measured and take antiresorptive drugs under medical guidance.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Harrison's Principles of Internal Medicine 第20版,McGraw-Hill,2018
J. Loscalzo et al., Harrison's Principles of Internal Medicine, 20th ed., McGraw-Hill, 2018
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY ISBN 标识 9781259644047（按标识回读: Harrison's prin
#骨质疏松 #雌激素 #破骨细胞 #骨密度
多囊卵巢综合征（PCOS）是怎么回事？
What is polycystic ovary syndrome (PCOS)?
PCOS是育龄女性最常见的内分泌代谢紊乱之一，世界卫生组织估计约影响8%～13%的育龄女性。核心表现是排卵障碍（月经稀少或不来）、雄激素偏高（多毛、痤疮）和超声下卵巢多囊样改变，很多患者同时存在胰岛素抵抗，因而2型糖尿病和血脂异常风险升高。管理以生活方式干预为基础，并根据目标选择调节月经的药物、改善胰岛素敏感性的药物或促排卵治疗。
PCOS is one of the commonest endocrine and metabolic disorders in women of reproductive age, affecting an estimated 8-13% of them according to WHO. Its core features are ovulatory dysfunction (infrequent or absent periods), excess androgens (hirsutism, acne) and a polycystic appearance of the ovaries on ultrasound, and many patients also have insulin resistance, raising their risk of type 2 diabetes and dyslipidaemia. Management starts with lifestyle measures, then adds drugs to regulate cycles, improve insulin sensitivity or induce ovulation, depending on the goal.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
Harrison's Principles of Internal Medicine 第20版,McGraw-Hill,2018
J. Loscalzo et al., Harrison's Principles of Internal Medicine, 20th ed., McGraw-Hill, 2018
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY ISBN 标识 9781259644047（按标识回读: Harrison's prin
#多囊卵巢综合征 #胰岛素抵抗 #雄激素 #排卵障碍
胰岛素在身体里起什么作用？
What role does insulin play in the body?
胰岛素由胰腺 β 细胞分泌，帮助血液中的葡萄糖进入肌肉、脂肪等细胞供能或储存，从而降低血糖。胰岛素不足或失效会导致血糖升高，即糖尿病。
Insulin is secreted by pancreatic beta cells and helps blood glucose enter cells (muscle, fat) for energy or storage, thereby lowering blood sugar. Too little insulin or poor response raises blood glucose, as in diabetes.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
美国糖尿病协会（ADA）《糖尿病医学诊疗标准》
American Diabetes Association (ADA) Standards of Medical Care in Diabetes
#胰岛素 #血糖 #糖尿病
糖化血红蛋白(HbA1c)为什么能反映过去几个月的血糖？
Why does HbA1c reflect blood sugar over the past few months?
葡萄糖会与红细胞中的血红蛋白缓慢、不可逆地结合形成 HbA1c，结合量正比于一段时间的平均血糖。红细胞的寿命约 120 天，因此该指标可代表近 2–3 个月的血糖控制水平，是糖尿病诊断与监测的关键。
Glucose slowly and irreversibly binds hemoglobin in red cells to form HbA1c, in proportion to average glucose over time. Since red cells live about 120 days, the value reflects roughly the last 2–3 months of control, making it key for diagnosis and monitoring.
难度 进阶 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-03
来源 · Source
美国糖尿病协会(ADA)《糖尿病诊疗标准》(2024)；Nathan 等《HbA1c 与平均血糖对照》(NEJM, 2008)
American Diabetes Association (ADA), 'Standards of Care' (2024); Nathan et al., 'HbA1c and mean glucose' (NEJM, 2008)
独立核验依据 · Independent verification: 核验依据 1 ARCHIVE 标识 diabetes-standards-of-care：Diabetes Standards
#HbA1c #糖化血红蛋白 #平均血糖 #红细胞寿命
长期碘摄入不足为什么会引起甲状腺弥漫性肿大（地方性甲状腺肿）？其背后是哪条激素反馈通路在起作用？
Why does chronic dietary iodine deficiency cause diffuse thyroid enlargement (endemic goiter), and which hormonal feedback pathway drives it?
碘是合成甲状腺激素T3、T4的必需原料。缺碘时激素合成减少，血中甲状腺激素水平下降，对垂体的负反馈抑制减弱，促甲状腺激素（TSH）分泌持续增多，长期刺激甲状腺滤泡上皮增生肥大，腺体遂弥漫性肿大，即地方性甲状腺肿。这是机体试图以更多细胞换取足够激素的代偿反应；食盐加碘后反馈紊乱得以纠正，肿大多能减轻或消退。
Iodine is the raw material for synthesizing the thyroid hormones T3 and T4. When intake falls, hormone output drops, weakening negative feedback on the pituitary; thyroid-stimulating hormone (TSH) secretion rises persistently and drives prolonged proliferation of thyroid follicular cells, so the gland enlarges diffusely — endemic goiter. This is a compensatory attempt to secure enough hormone with more cells; once salt is iodized the feedback disturbance corrects itself, and most goiters shrink or regress.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Melmed, S. 等（主编），《威廉姆斯内分泌学》（Williams Textbook of Endocrinology，第14版），Elsevier，2019年
Melmed, S. et al. (eds.), Williams Textbook of Endocrinology, 14th ed., Elsevier, 2019
独立核验依据 · Independent verification: 核验依据 1 OPENLIBRARY 标识 /works/OL15901588W：Williams textbook of e
#内分泌学 #碘缺乏 #甲状腺肿 #负反馈调节
为什么左甲状腺素建议清晨空腹服用，并且要与钙剂、铁剂等间隔数小时？
Why is levothyroxine best taken on an empty stomach in the morning, several hours apart from calcium or iron supplements?
左甲状腺素主要在小肠吸收，酸性胃环境有助于药片溶出。食物及钙、铁、铝制剂和抑酸药会与之结合或延缓胃排空，使吸收减少两三成，导致血药浓度与TSH波动。建议晨起空腹服药、至少30分钟后再进早餐，钙铁剂间隔4小时以上，这样吸收稳定，便于按TSH精准调整剂量。
Levothyroxine is absorbed mainly in the small intestine and dissolves best in acidic gastric juice. Food and cations such as calcium, iron or aluminium, plus acid-suppressing drugs, chelate the tablet contents or slow gastric emptying, cutting absorption by up to 20-30% and making serum levels and TSH fluctuate. Taking it fasting after waking, waiting at least 30 minutes before breakfast and keeping calcium or iron four hours apart keeps absorption steady for precise TSH-guided dosing.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录含书名，但缺版次 / 出版社 / 年份中的一部分，需编辑补全后才能做独立比对。
Jonklaas J等，《成人甲状腺功能减退治疗指南》（美国甲状腺学会），Thyroid期刊2014年第24卷第12期1670-1751页
Jonklaas J, Bianco AC, Bauer AJ, et al. 2014 ATA Guidelines for Treatment of Hypothyroidism. Thyroid, 2014;24(12):1670-1751
#左甲状腺素 #甲状腺功能减退 #药物吸收 #TSH
糖尿病为什么号称「血管的慢性腐蚀剂」,连眼睛和肾都遭殃?
Why does diabetes act like a slow corrosive on blood vessels, damaging even eyes and kidneys?
长期高血糖让葡萄糖粘到蛋白质和脂质上,经数周至数月形成不可逆的糖基化终产物(AGEs)。它们一方面在血管壁交联沉积,使大动脉僵硬、管腔狭窄;另一方面激活受体引发慢性炎症与氧化应激,损伤微血管最密集的视网膜与肾小球——所以糖尿病视网膜病变与糖尿病肾病成了失明和透析的头号原因之一。强化控糖能显著延缓这一链条,这正是糖化血红蛋白要长期达标的原因。
Chronic high glucose sticks sugars onto proteins and lipids, forming irreversible advanced glycation end products over weeks to months. AGEs cross-link and deposit in vessel walls, stiffening arteries and narrowing lumens, while also triggering receptor-driven chronic inflammation and oxidative stress that ravages the microvascular beds of retina and glomeruli — hence diabetic retinopathy and nephropathy rank among the leading causes of blindness and dialysis. Tight glucose control markedly slows this cascade, which is why long-term HbA1c targets matter.
难度 进阶 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Giacco 与 Brownlee,《Oxidative Stress and Diabetic Complications》,Circulation Research,2010 (DOI: 10.1161/circresaha.110.223545)
Giacco & Brownlee, 'Oxidative Stress and Diabetic Complications', Circulation Research, 2010, DOI: 10.1161/circresaha.110.223545
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.1161/circresaha.110.223545
#糖尿病 #糖基化终产物 #微血管病变
食盐里为什么要加碘？
Why is iodine added to table salt?
甲状腺需要碘来合成甲状腺激素，而内陆和山区的土壤、饮水中碘含量很低。碘摄入不足会使甲状腺代偿性增大形成“大脖子病”（地方性甲状腺肿），孕期缺碘还会损害胎儿脑发育，造成智力和听力障碍。世界卫生组织与联合国儿童基金会推荐普遍食盐加碘，这是历史上最成功、最廉价的公共营养干预之一。
The thyroid needs iodine to make thyroid hormone, yet soil and water inland and in mountainous areas contain very little of it. Too little iodine makes the thyroid enlarge as compensation, producing endemic goitre, and deficiency during pregnancy harms fetal brain development, causing intellectual and hearing impairment. WHO and UNICEF therefore recommend universal salt iodization, one of the cheapest and most successful public nutrition measures in history.
难度 入门 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
王庭槐 主编,《生理学》第9版,人民卫生出版社,2018
Wang Tinghuai ed., Physiology, 9th ed., People's Medical Publishing House, 2018
独立核验依据 · Independent verification: 核验依据 2 ISBN 9787117266598（豆瓣书目条目: 生理学）
#碘 #甲状腺 #地方性甲状腺肿 #食盐加碘
甲状腺功能亢进的人为什么怕热、多汗、心慌,还吃得多却变瘦?
Why does an overactive thyroid make people heat-intolerant, sweaty, jittery — hungry yet losing weight?
甲状腺激素是全身代谢的总油门:它进入细胞核调高基因表达,增加线粒体数量与产热蛋白,使基础代谢率可升高五成以上。激素过量时,身体像怠速被调高的引擎——产热暴增所以怕热多汗,心肌对肾上腺素更敏感所以心慌手抖,肠道蠕动加快、脂肪与肌肉分解超过摄入所以吃得再多也瘦。治疗思路相应是三选一:抗甲状腺药减少合成,放射性碘让腺体缩小,或手术切除部分组织。
Thyroid hormone is the body's metabolic throttle: entering the nucleus it upregulates gene expression, boosts mitochondria and uncoupling proteins, and can raise basal metabolic rate by half or more. With excess hormone the engine idles too high — heat production soars causing intolerance and sweating, the heart grows hypersensitive to adrenaline causing palpitations and tremor, and gut transit plus fat-and-muscle breakdown outpace intake so weight falls despite appetite. Treatment accordingly blocks synthesis with drugs, shrinks the gland with radioactive iodine, or removes part surgically.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
Brent,《Clinical Practice: Graves Disease》,New England Journal of Medicine 第358卷,2008
G. A. Brent, Clinical Practice: Graves Disease, New England Journal of Medicine 358, 2008
独立核验依据 · Independent verification: 核验依据 1 EUROPEPMC 标识 18550875：Clinical practice. Graves' disease
#甲亢 #基础代谢率 #甲状腺激素