指導個案正確洗手時，下列何者最重要？
Which action is most important when teaching a client about proper hand hygiene?
- AWash hands for at least 20 seconds✓ 正解洗手至少 20 秒
- BUse only hot water to kill bacteria僅使用熱水殺死細菌
- CApply soap only to the palms僅在手心塗抹肥皂
- DDry hands thoroughly with a shared towel使用共用毛巾徹底擦乾雙手
洗手是控制感染（Infection control）最基本且有效的措施。護理核心在於透過物理摩擦與肥皂乳化作用，去除皮膚表面的暫時性菌叢。根據 CDC 指引，洗手時間應至少 20 秒，涵蓋手背、指縫、指甲周圍及手腕。臨床思路應強調「機械式清潔」的重要性，而非依賴水溫；共用毛巾會造成二次污染，應使用紙巾擦乾。
Hand hygiene is the most fundamental and effective measure for infection control. The nursing principle is to remove transient skin flora through physical friction and the emulsifying action of soap. According to CDC guidelines, hand washing should last at least 20 seconds and cover the back of the hands, between the fingers, around the nails, and the wrists. Clinical reasoning should emphasize the importance of 'mechanical cleansing' rather than reliance on water temperature; shared towels cause secondary contamination, so disposable paper towels should be used for drying.