We shouldn't have come north for Christmas vacation. If we _______, we wouldn't be stuck in the snow right now.

A．wasn't

B．didn't

C．hadn't

D．weren't

男，20岁。闭合性肝破裂伴大出血休克，经紧急施行肝破裂修补手术后控制出血，伤后第2天发生ARDS，以下不属于ARDS的发病基础的是（）

A.肝损伤

B.全身炎症反应

C.休克

D.感染

E.应激反应