为什么夏天容易被晒伤?
Why do we get sunburned more in summer?
紫外线(尤其UVB)会损伤皮肤细胞DNA,引发红肿疼痛的炎症反应,也就是晒伤。涂防晒、避开强紫外线时段可减少伤害。
Ultraviolet light - especially UVB - damages skin-cell DNA and triggers the red, painful inflammation we call sunburn. Sunscreen and avoiding peak sun reduce harm.
难度 进阶 · 适合 小学低段(6-8)
CC BY 4.0 · 来源待核验 · Source pending review
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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。
美国皮肤病学会(AAD)《晒伤》
American Academy of Dermatology (AAD): Sunburn
#晒伤 #紫外线 #防晒
湿疹(特应性皮炎)的核心机制是什么?
What is the core mechanism of eczema (atopic dermatitis)?
它常与皮肤屏障功能缺陷、免疫失衡(如2型炎症)和遗传易感相关,使皮肤易干痒、发炎和感染。规范保湿与抗炎治疗可显著改善。
It often involves a defective skin barrier, immune imbalance (e.g., type-2 inflammation) and genetic susceptibility, making skin dry, itchy, inflamed and infection-prone. Structured moisturizing and anti-inflammatory care help greatly.
难度 进阶 · 适合 高中(15-18)
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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。
美国皮肤病学会(AAD)《特应性皮炎》
American Academy of Dermatology (AAD): Atopic dermatitis
#湿疹 #皮肤屏障 #炎症
为什么伤口结痂前保持适度湿润更利于愈合?
Why does a lightly moist wound heal better than a dry one?
适度湿润的环境利于表皮细胞迁移和生长因子发挥作用,愈合更快、瘢痕更轻;过度干燥会延缓上皮化。但过湿或感染则会适得其反。
A lightly moist environment helps skin cells migrate and growth factors work, speeding healing with less scarring; too dry slows it. But excess moisture or infection reverses the benefit.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
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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。
Winter《结痂形成与上皮化速率》(Nature, 1962)
Winter, Formation of the scab and the rate of epithelialization (Nature, 1962)
#伤口愈合 #湿润 #瘢痕
为什么摔倒擦破皮会流血结痂?
Why do scrapes bleed and then form a scab?
皮肤破了,下面的小血管会流血;身体很快用血痂像小盖子一样把伤口盖住,保护它慢慢长好。
When skin breaks, tiny blood vessels bleed; your body quickly caps the spot with a scab like a little lid so it can heal.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 来源待核验 · Source pending review
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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。
Kumar 等《Robbins 病理学基础》(Robbins Pathologic Basis of Disease)创伤愈合章节
Kumar et al., Robbins Pathologic Basis of Disease (wound healing chapter)
#擦伤 #结痂 #伤口
皮肤是怎样保护我们身体的?
How does skin protect the body?
皮肤的角质层和皮脂膜构成物理与化学屏障,阻挡病原体和水分流失;其中的免疫细胞和神经还能感知伤害并启动防御。
The stratum corneum and skin oils form a physical and chemical barrier against germs and water loss; immune cells and nerves sense damage and launch defense.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 3 条独立证据
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Guyton 与 Hall《医学生理学》(Textbook of Medical Physiology)皮肤生理章节
Guyton and Hall, Textbook of Medical Physiology (skin physiology chapter)
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-0-323-59712-8 · 核验依据 2 ISBN 978-1-4557-4377-3 (3rd ed., Elsevier) · 核验依据 3 ISBN 978-1-319-45541-5 (8th ed., Macmillan Learning)
#皮肤 #屏障 #免疫
为什么老年人皮肤容易干燥发痒?
Why does older skin get dry and itchy?
随着年龄增长,皮脂和汗液分泌减少、角质层保水能力下降,皮肤更易干燥;适度保湿、减少过热洗浴可缓解。
With age, less oil and sweat and weaker water retention make skin drier; gentle moisturizing and cooler baths help.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 3 条独立证据
来源 · Source
Guyton 与 Hall《医学生理学》(Textbook of Medical Physiology)皮肤生理与老化章节
Guyton and Hall, Textbook of Medical Physiology (skin physiology & aging chapter)
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-0-323-59712-8 · 核验依据 2 ISBN 978-1-4557-4377-3 (3rd ed., Elsevier) · 核验依据 3 ISBN 978-1-319-45541-5 (8th ed., Macmillan Learning)
#皮肤 #衰老 #保湿