Occasions are quite rare ____I have the time to spend a day with my kids.

A．who

B．which

C．why

D．when

关于口服铁剂治疗缺铁性贫血哪项错误

A．与维生素C同用可增强效果
B．血象恢复正常后可马上停药
C．从小剂量开始以减少胃肠道反应
D．服药2h内禁止饮浓茶
E．服药后常出现大便发黑