A：What's wrong with you?怎么了?
B：I have had a low fever these days.这些日子我一直发低烧。
A：Don't worry. I'll write you a prescription for a new medicine that works wonders.别担心，我给你开种新药，对这种病疗效奇佳。
B：Thank you, doctor.谢谢了，医生。