This topic studies the drug interaction of warfarin sodium. Eating foods containing vitamin K should be as stable as possible during treatment. The biggest source of vitamin K is green vegetables and leaves, such as amaranth, avocado, cauliflower, sprouts, cabbage, rapeseed oil, cucumber, onion, radish seed, cucumber skin (peeled cucumber is not), chicory, kale leaves, kiwi fruit and lettuce leaves. So the correct answer is D.