--You don't look so well, Mary. What's the matter with you?

　　--Why?___________.

A．I'm not myself

B．Fine, think you

C．I felt bad

D．I'm quite myself

男性，58岁，反复咳嗽、咳白黏痰10年，冬季症状加重。查体：两下肺湿啰音，有散在的哮鸣音。诊断首先考虑（）

A.肺结核

B.支气管扩张

C.支气管哮喘

D.慢性支气管炎

E.支气管肺癌