— My head often hurts.

— ______[ ]

A. I think so.

B. That's OK.

C. Really?

D. Thank you.

男性，18岁。右侧呼吸运动减弱，语颤消失，右下肺叩诊实音，实音区上方闻及支气管呼吸音。首先应考虑为

A．支气管哮喘

B．大叶性肺炎

C．支气管扩张

D．胸腔积液