I am a doctor.对划线部分提问？

What do you do?一般都适用。
What are you?仅对一部分英国人适用。

What are you? / What do you do?

What do you do?

what's your job?

What job do you do?

what are you 和what do you do ?

但在口语上一般用后者..因为what are you 还有"你是什么东西的意思"

不常用