单项选择题

A.早产儿0.2-0.3mmol/(kg·d),足月儿0.3-0.4mmol/(kg·d)
B.早产儿0.3-0.4mmol/(kg·d),足月儿0.2-0.3mmol/(kg·d)
C.早产儿0.4-0.5mmol/(kg·d),足月儿0.3-0.4mmol/(kg·d)
D.早产儿0.3-0.4mmol/(kg·d),足月儿0.4-0.5mmol/(kg·d)