----Do you think Tim did well in the English speech contest?

----______. He won the first place.

A．He couldn’t have done better.

B．He played naturally

C．He was not nervous at all

D．I couldn’t agree more

胸部外伤后开胸探查手术的指征是（）

A.胸内异物

B.膈肌破裂

C.气管支气管损伤

D.胸内持续出血

E.以上都是