Translation of "Surgeon" in Chinese

He's an excellent brain surgeon.

他是一個優秀的腦外科醫生。

My father is an expert surgeon.

我父亲是一名外科专家。

There are two doctors in his circle of friends, a surgeon and an ophthalmologist.

他的圈子裏有兩人是醫生，一個是外科醫生，另一個是眼科醫生。