He wanted to make sure __________.            [ ]

A. how we went there by bus  

B. where did we go

C. what did we go there        

D. when we went there  

形成尿液结石的因素包括（）

A.草酸代谢异常

B.钙代谢异常

C.肾小管酸中毒

D.尿路感染

E.低蛋白、低脂肪饮食