It was reported that many helicopters were sent there _________the missing passengers.

A．in search of

B．in need of

C．in charge of

D．in time of

直肠脱的常见诱因是（）

A、肝炎、胰腺炎

B、胃扩张、胃穿孔

C、胃炎、胃溃疡

D、便秘、腹泻

E、腹膜炎、胸膜炎