问题 问答题 简答题

试述热疗镇痛的机制。

答案

参考答案:

热疗镇痛的机制为:热疗有降低感觉神经的兴奋,提高痛阈的作用,热可使肌梭兴奋性下降,导致肌肉放松,而减少肌肉痉挛;热可使血管扩张,增加血液循环,降低患部充血、水肿,促进炎症吸收;皮肤温度感受器受到刺激,可以抑制疼痛反射。热疗对慢性疼痛有较好效果,机体深部组织的疼痛可采用深部透热(高频透热或超声透热)。对于浅表部的慢性疼痛可以采用蜡疗、红外线照射等。

阅读理解

请先通读下列短文,然后从所给的七个选项中选出能填入空格的最佳选项。

     1_____ One of the best things you can possibly do is to start you own club. It's great fun especially if you

are the sort of person who feels there's never anything to do during the school holidays.   

     The first thing you need to come up with is an idea for your club. What are you interested in? Pets, clothes,

pop music or dancing groups, sports, or making things? 2_____   

     Next you need some friends to be in your club with you. 3_____ All you need is three or four other people

who are interested in the same thing as you.    

     4_____ You should all sit down somewhere together with lots of pieces of paper and write down every name

you can think up. That'll keep you busy for ages.   

     At your first meeting you should make up a rule book. And the first rule should be no grown-ups or little/big

brothers or sisters! The best clubs are always secret!   

     Now you have just about everything you need, except membership cards. These are very important and again

you will spend a lot of time making them. Use a bright thick pen to make a special design. Why not leave some

space for a photo of yourself? 5_____   

     So there you are, get clubbing! Once you get started you'll think of loads of more interesting things to do!

A. That's easy.   

B. The list is endless.   

C. Enjoy your own club!   

D. Invite a designer to join you.   

E. Winter vacation is just around the corner.   

F. Then you need to pick a name for your club.   

G. That will make the membership card really look like it.

单项选择题