I have worked with children, so I know _____ to expect in my job.

A．what

B．how

C．where

D．why

眼球穿通伤的治疗原则是（）

A.对贯通伤的后部伤口要严密缝合

B.对贯通伤的后部伤口不要勉强缝合

C.防止感染

D.初期缝合伤口

E.必要时行二期手术