護理師教導病人自行皮下注射胰島素。下列哪些行動顯示病人已學習正確？（選所有適合的）
A nurse is teaching a client about self-administration of subcutaneous insulin. Which actions by the client indicate effective learning? (Select all that apply.)
- ARotating injection sites within the same anatomical area✓ 正解在同一解剖區域內輪替注射部位
- BPinching the skin before inserting the needle✓ 正解插入針頭前捏起皮膚
- CMassaging the injection site after withdrawing the needle拔出針頭後按摩注射部位
- DCleaning the site with an alcohol swab and letting it air dry✓ 正解用酒精棉片清潔部位並讓其自然風乾
- EInjecting the insulin at a 90-degree angle✓ 正解以 90 度角注射胰島素
核心概念：皮下胰島素（Subcutaneous Insulin）注射的正確技術。 為何正確答案對： A. 在同一身體區域內輪替注射部位（Rotating injection sites within the same anatomical area），例如腹部輪替，或在手臂、大腿等部位輪替，可預防因反覆在同一點注射導致的皮下脂肪組織異常（Lipodystrophy），確保胰島素吸收的穩定性。 B. 注射前捏起皮膚（Pinching the skin）形成皮褶，有助於確保針頭進入皮下脂肪層，而非肌肉層，特別是對於較細的針頭或體型較瘦的病人。 D. 注射部位使用酒精棉片消毒（Cleaning the site with an alcohol swab）後讓其自然風乾，是標準的無菌操作，能有效預防局部感染。 E. 對於大多數成人，皮下注射胰島素採用 90 度角（Injecting the insulin at a 90-degree angle）進入皮膚，是確保藥物進入皮下組織的常見且有效的方法（較細的針頭或皮下脂肪較少者，可能需 45 度角）。 為何其他選項錯： C. 注射後按摩注射部位（Massaging the injection site after withdrawing the needle）會加速胰島素吸收，可能導致血糖快速下降（Hypoglycemia），尤其對於速效胰島素，應避免劇烈按摩。
Core concept: correct technique for subcutaneous insulin injection. Why the correct answers are correct: A. Rotating injection sites within the same anatomical area—for example, rotating within the abdomen, or rotating among the arms, thighs, and other sites—prevents lipodystrophy resulting from repeated injection at the same spot, ensuring consistent insulin absorption. B. Pinching the skin prior to injection forms a skin fold and helps ensure that the needle enters the subcutaneous fat layer rather than muscle, especially with finer needles or in thinner patients. D. Cleaning the site with an alcohol swab and allowing it to air dry is the standard aseptic procedure and effectively prevents local infection. E. For most adults, injecting insulin at a 90-degree angle is a common and effective method to ensure the drug enters the subcutaneous tissue (a 45-degree angle may be needed with finer needles or in patients with less subcutaneous fat). Why the other option is incorrect: C. Massaging the injection site after withdrawing the needle accelerates insulin absorption and may cause rapid drops in blood glucose (hypoglycemia), especially with rapid-acting insulins; vigorous massage should therefore be avoided.