A、Every day for seven weeks. B、Three times a week for seven weeks. C、Three times a week for three weeks. D、Twenty times for a we

W：Hello, I’m Jenny Johnson. How are you this morning?
M：Hello! Doctor Johnson, I can’t say I’m feeling well. I have a pain and swelling in my knees.
W：What kind of pain is it?
M：It is a dull ache. But sometimes the pain is constant, and disturbs my sleep.
W：How long have you been feeling pain in your knees?
M：For about two years. But recently, I feel pain in my fingers.
W：Have you had any swelling in your fingers?
M：Yes, a little.
W：How about your wrists or toes?
M：No, only my knees and fingers. The pain becomes worse when the weather changes, like in cloudy or wet weather.
W：OK. Let me see your blood test report first.
M：How is it?
W：Not very bad.
M：Do I have to have an operation?
W：No, I don’t think so. I’ll prescribe some traditional Chinese medicine. Also you need a treatment with rays below the red in the spectrum.
M：Do I have to come here every day for the treatment?
W：Not every day. Can you come three times a week? A course of treatment includes 20 times, so you have to come for the treatment three times a week for seven weeks.
M：How long does each treatment take?
W：30 minutes.
M：OK. I’ll do that.
W：When you are at home, use these hot water pads as often as possible. Put one over your knees. Try to avoid using cold water.
M：OK. Thank you, Doctor.
W：You’re welcome.
1. What is the problem with the man?
2. How does the woman treat the man’s problem?
3. How often does the man come for the treatment?
4. What does the doctor suggest the man do at home?