you should go to see a doctor. 后句

,or you will be badly.否则你会病得很厉害的” 应该就是这样吧

When you are ill, you should go to see a doctor. After the doctor look you over, he will write you a note to take to the chemist for some medicine. Chemists are usually good at reading doctor’s notes. But sometimes doctors write too badly and even the chemist can not read them. One day a woman wrote to a doctor to 。。。。。。。。。。。。。。。

or you will be bad/worse。