单项选择题

A1型题 治疗缺铁性贫血口服补铁按照元素铁计算,每日补充剂量是()

A.1~2mg/(kg·D.
B.2~4mg/(kg·D.
C.4~6mg/(kg·D.
D.6~8mg/(kg·D.
E.8~9mg/(kg·D.