------ The authors of computer viruses are geniuses.

------ I agree. They can apply their wisdom to other net technology ________ human beings can benefit.

A．in which

B．through which

C．on which

D．from which

下列关于新生儿出生后维生素及微量元素的补充，错误的是（）。

A.生后应立即补充维生素K1mg，早产儿连用3天

B.生后4天加用维生素C50～100mg／d

C.4周后加维生素A500～1000IU／d、维生素D400～1000IU／d，早产儿用偏大量

D.4周后加用铁剂，足月儿每日给元素铁2mg／kg；出生体重＜1500g的早产儿每日给3～4mg／kg

E.补铁的同时加用维生素E25IU和叶酸2.5mg，1周2次