Mary was praised by the headmaster in public and on that _______ she was simply proud.

A．position

B．circumstance

C．occasion

D．situation

腹部闭合性损伤患者伴休克，腹穿抽出不凝固血液。

应采取的治疗原则是（）

A.抗休克待血压好转后手术

B.输血补液，并用升压药物抗休克

C.先抗休克后手术

D.抗休克同时手术

E.用大量止血药物不手术