单项选择题

Conversation 2
Questions 8 to 10 are based on the conversation you’ve just heard.
[听力原文] 8-10
M: What’s the matter with you, madam
W: I have a headache. And I felt confused and cold.
M: You probably have caught a cold. Let me check your pulse and lake your temperature. Oh, you de have a high fever.
W: Is it serious
M: Take it easy. Here is the prescription and get some medicine, you will be better soon.
W: Do I have to be given an injection
M: Yes, before you leave, I want my nurse to give you an injection.
W: Okay. Do I have to go on a diet
M: Not necessarily. Drink as much water or juice as you can, avoid greasy food and keep warm.
W: Thank you.

What is the probable relationship between the two speakers（）

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