内科大夫说，吸烟对我的健康有害。

The physician said smoking is harmful to my health.

youdao

我是个内科大夫，在一个以脑外科为专长的医院工作。

Now I am a physician, working in a hospital that specialises in brain surgery. (in a hospital whose speciality is brain surgery)

youdao

他确信，一个内科大夫三分之二的看诊费用都源自各种各样病人幻想出来的小毛病。

He was convinced that two thirds of a physician’s fee were generated out of imaginary complaints.

youdao