doctor前加什麼冠詞

doctor前邊可以加冠詞a，例如：

1、You'd better see a doctor about that cough.你最好找醫生治治你的咳嗽。

2、I tried to persuade her to see a doctor.我極力勸她去看醫生。

3、Don't just stand there， man ─ get a doctor!你這傢伙，別隻是站著——趕緊去找醫生呀！