護理師對一位服用華法林（Warfarin）的病人衛教，應強調哪一點？
A nurse is teaching a client about warfarin therapy. Which point should be emphasized?
- AMaintain a consistent intake of vitamin K-rich foods✓ 正解維持攝取含維生素K食物的量一致
- BMonitor blood glucose levels daily每日監測血糖
- CIncrease green leafy vegetable consumption增加深綠色葉菜類的攝取
- DTake extra doses if bleeding occurs若發生出血則額外服藥
華法林（Warfarin）是一種維生素 K 拮抗劑，透過抑制肝臟合成依賴維生素 K 的凝血因子（II, VII, IX, X）來發揮抗凝血作用。飲食中維生素 K 的攝取量會直接影響華法林的藥效（即 INR 值）。若病人飲食中綠色蔬菜攝取量劇烈波動，會導致凝血功能不穩定，增加出血或血栓風險。衛教重點在於「維持穩定攝取」，而非完全避免攝取。
Warfarin is a vitamin K antagonist that exerts its anticoagulant effect by inhibiting the hepatic synthesis of vitamin K-dependent clotting factors (II, VII, IX, X). Dietary vitamin K intake directly affects warfarin's efficacy (reflected in the INR). If the patient's intake of green leafy vegetables fluctuates dramatically, coagulation will become unstable, increasing the risk of bleeding or thrombosis. The key teaching point is to "maintain a consistent intake," rather than avoiding these foods entirely.