Mr. Lee, who        as a guide for over 10 years, is now a manager in a big travel agency.

A．worked

B．has worked

C．had worked

D．works

损伤性气胸的治疗，不正确的是

A．肺萎缩在30％以下者可不必处理

B．大量气胸应行胸穿抽气或闭式引流

C．开放性气胸应迅速使开放变闭合

D．张力性气胸应立即开胸探查

E．穿刺抽气应在伤侧锁骨中线第2肋间