开放性骨折的处理，下列正确的是（）

A.清创处理污染的骨质

B.失去活力的大块肌组织可以部分保留

C.大块的碎骨块可在清洁消毒后放回原处

D.不能切除创口的边缘

E.已污染的骨膜应完全切除

_____Craig loves his students, he is very strict with them in their performances.

A．While

B．Whenever

C．As if

D．The minute