— Jim, don't play computer games anymore!

— Sorry. I             do it again. [ ]

A. won't

B. couldn't

C. didn't

64岁男性患者，反复咳嗽、咯痰，痰中带血2周。体温38.3℃，WBC12×109／L，胸片右肺门肿块影，伴远端大片状阴影，抗炎治疗阴影不吸收。（以下3题共用题干）

有助于尽快明确诊断的检查首选（ ）。

A．CT

B．磁共振

C．胸腔镜

D．纤支镜

E．核素扫描