A.元素鐵0.5~1mg/(kg·次),每日2~3次,餐前 B.元素鐵1~2mg/(kg·次),每日2~3次,餐前 C.元素鐵3~4mg/(kg·次),每日2~3次,餐前 D.元素鐵0.5~1mg/(kg·次),每日2~3次,兩餐之間 E.元素鐵1~2mg/(kg·次),每日2~3次,兩餐之間