The lucky fans will be picked out________ rather than  chosen  beforehand  to perform with the

singer during the party.    [ ]

A. by accident        

B. on earth    

C. come across        

D. come on

男性，65岁。低热，咳嗽并痰中带血丝3个月。胸片显示左肺上叶不张，少量胸膜腔积液。为确诊，进一步检查应首选（）

A.胸部CT

B.剖胸探查

C.胸腔镜检查

D.支气管镜检查

E.经胸壁穿刺活组织检查