问题 问答题 简答题

中枢神经系统感染的途径是什么?

答案

参考答案:

CNS感染途径包括:①血行感染:病原体通过昆虫叮咬、动物咬伤、使用不洁注射器、输血等进入血液,面部感染时病原体可经静脉逆行人颅,孕妇感染时病原体经胎盘传递给胎儿等;②直接感染:贯穿性颅脑损伤或脑邻近组织感染时病原体可直接扩散人颅;③神经干逆行感染:嗜神经病毒如单纯疱疹病毒、狂犬病毒等感染皮肤、呼吸道或胃肠道粘膜后可沿神经末梢进入神经干。

在选用上述药物治疗时主要注意的是药物的不良反应。如无环鸟苷的应用主要是注意其可能导致震颤、皮疹、谵妄、血尿、血清转氨酶升高的不良反应;刚昔洛韦的应用主要注意肾功能损害和骨髓抑制(中性粒细胞减少、血小板减少)。

阅读理解

阅读理解。

     American people like to say "Thank you" when others help them or say something kind to them.

People of many other countries do so, too. It is a very good habit.

     You should say "Thank you" .When someone passes you the salt on the table, or opens the door for

you, or says you have done your work well.

     "Thank you" is used not only between friends but also parents and children, brothers and sisters,

husbands and wives.

     "Excuse me" is another useful short sentence. When you hear someone say so behind you. You know

somebody wants to walk past you without touching you.

     It's not polite to interrupt (打断) others when they are talking. If you want to speak to one of them,

say "Excuse me" first, and then begin talking. You should also do when you want to make any noise

before others.

     Let's all learn to say "Thank you" and "Excuse me".

1.________ like to say "Thank you" and "Excuse me".

A.Only American people

B.All the people except American

C.People in many counties

D.Few people outside China

2.You should say "Thank you" when ________.

A.someone helps you

B.you should make a mistake

C.you want to cough before others

D.you pass a glass of water to others

3.If you want to walk past somebody without touching him, you'd better say "________" first.

A.Don't move

B.How do you do

C.Stop here

D.Excuse me

4.When you hear others say your handwriting is excellent, you should say "________" first.

A.I'm so sorry

B.Excuse me

C.Thank you

D.How about yours

5.Which of the following is true?

A.We usually don't say "Excuse me" in daytime.

B.People say "Thank you" among the members of a family and between friends.

C.If you want to make any noise before others you should say "Thank you" first.

D.People say "Excuse me" only between brothers and sisters.

填空题