I would appreciate _____if you could help me get a ticket in the Peak Transport in the Spring Festival Season.

A．you

B．that

C．this

D．it

维生素D缺乏性佝偻病的预防工作下列哪种是错误的（）

A.孕妇多做户外活动

B.孕期后3个月适当补充维生素D及钙剂

C.新生儿出生后即口服维生素D

D.婴儿期尽早进行户外活动

E.母乳喂养及时添加辅食