下列哪种是不正确的小儿液体疗法（）

A.中度以下脱水可用口服补液

B.重度脱水需先快速扩容

C.维持补液阶段一般速度为5ml/（kg.h）

D.营养不良伴腹泻患儿常用1/3张溶液，速度宜稍快

E.轮状病毒肠炎引起的等渗性脱水，常用1/2张溶液

When Bob woke up he found himself in hospital, but he   didn't know how that _____  .    [ ]

A. came about                      

B. came out    

C. came along                      

D. came across