護理師指導慢性靜脈功能不全（CVI）病人自我護理，下列哪些指導是正確的？（選所有適合的）
A nurse is teaching a client about self-care for chronic venous insufficiency. Which instructions are appropriate? (Select all that apply.)
- AWear compression stockings during the day✓ 正解白天穿著彈性襪
- BAvoid crossing your legs while sitting✓ 正解坐著時避免翹腳
- CElevate your legs above heart level periodically✓ 正解定期將腿部抬高至心臟水平以上
- DApply heating pads to the lower legs to improve blood flow在下肢使用熱敷墊以改善血液循環
- ESleep with feet of the bed elevated✓ 正解睡覺時抬高床尾
慢性靜脈功能不全（Chronic Venous Insufficiency, CVI）的核心病理機轉在於靜脈瓣膜受損導致血液回流受阻，造成血液在下肢靜脈淤積。護理目標為減輕靜脈高壓、促進靜脈回流及預防併發症（如靜脈潰瘍）。彈性襪、抬高患肢及改變姿勢均能利用重力與外部壓力協助回流。應避免可能阻礙循環的行為（如翹腳）及可能導致血管擴張而加重淤積的熱敷。
The central pathophysiology of chronic venous insufficiency (CVI) is damage to venous valves, impaired venous return, and pooling of blood in the lower extremity veins. Nursing goals are to reduce venous hypertension, promote venous return, and prevent complications such as venous ulcers. Compression stockings, elevating the affected limb, and changing position all use gravity and external compression to facilitate venous return. Behaviors that impede circulation (such as crossing the legs) and measures that may dilate vessels and worsen venous pooling (such as applying heat) should be avoided.