问题 单项选择题 B1型题

小剂量阿司匹林预防血栓形成的机制是()。

A.抑制单胺氧化酶

B.抑制TXA2生成

C.抑制胆碱酯酶

D.激动多巴胺受体

E.阻断多巴胺受体

答案

参考答案:B

解析:

1.[考点]多巴胺的药理作用。多巴胺舒张肾血管和肠系膜血管,此作用与药物选择性激动血管平滑肌的多巴胺受体有关,使肾血管扩张,增加肾血流量及肾小球滤过率,使尿量增多,可用于急性肾衰竭。2.[考点]小剂量阿司匹林预防血栓形成的机制。阿司匹林能抑制前列腺素合成酶的活性,实验证明血小板中前列腺素合成酶对阿司匹林的敏感性远较血管壁的前列腺素合成酶为高,因此小剂量阿司匹林使血小板内血栓素(TXA2)的生成减少,从而抗血栓形成。

阅读理解

阅读理解。

     Parents often say,"I don't understand why my child is acting this way.We've given him everything in

the world,and he just wants more.He's never happy.He doesn't enjoy what he has."

     For some reason,we often feel that if we give our child everything he wants to keep him happy,he

should behave the way we want him to.An important part of meeting children's emotional(情感的)needs

is to set limits often and firmly in a loveing way.Pardnts who learn to set limits in a loving way set them

more often because they don't have to wait until they've "had it up to here" to do so.

     A therapeutic(治疗的)way of setting limits is called ACT:Acknowledge the feeling,communicate the

limit,and target the choice.Necessarily,you're saying to the child,"I understand how you feel.It's OK to

feel that way,but you can't act that way when you feel like that.You can act this way when you feel like

that." It's also important to communicate this message in a loving way,not an angry way.

     Using ACT limitsetting teaches children to cope with their emotions and to find appropriate behavioral

expressions that don't hurt the children themselves.It can also be used to teach children to delay

gratification(满意).Here are some examples of how it works.If your child wants a toy when you're at

the store and you don't want to buy it,you can say,(A)"You love that toy and want it right now,(C)but

we're not spending any money on toys today.(T)You can put it on your wish list for birthday or Christmas."

Using this technique,you'll learn to set reasonable limits that work.If you set limits too severely,you're

also more likely to give in,because you feel guilty.If you don't follow through with a consequence or you

make one that's too severe,you teach your child not to trust you.

     Parents often say,"I don't understand why my child is acting this way.We've given him everything in

the world,and he just wants more.He's never happy.He doesn't enjoy what he has."

For some reason,we often feel that if we give our child everything he wants to keep him happy,he should

behave the way we want him to.An important part of meeting children's emotional(情感的)needs is to

set limits often and firmly in a loveing way.Pardnts who learn to set limits in a loving way set them more

often because they don't have to wait until they've "had it up to here" to do so.

     A therapeutic(治疗的)way of setting limits is called ACT:Acknowledge the feeling,communicate the

limit,and target the choice.Necessarily,you're saying to the child,"I understand how you feel.It's OK to feel that way,but you can't act that way when you feel like that.You can act this way when you feel like that." It's also important to communicate this message in a loving way,not an angry way.

     Using ACT limitsetting teaches children to cope with their emotions and to find appropriate behavioral

expressions that don't hurt the children themselves.It can also be used to teach children to delay

gratification(满意).Here are some examples of how it works.If your child wants a toy when you're at

the store and you don't want to buy it,you can say,(A)"You love that toy and want it right now,(C)but

we're not spending any money on toys today.(T)You can put it on your wish list for birthday or Christmas."

Using this technique,you'll learn to set reasonable limits that work.If you set limits too severely,you're also more likely to give in,because you feel guilty.If you don't follow through with a consequence or you make

one that's too severe,you teach your child not to trust you.

1.The first paragraph is mainly to show that _____.

A. parents can't get along well with children

B. children's emotions are hard to meet

C. parents don't understand children at all

D. children are the real burden to parents

2. As parents,once we give children what they want,we hope that _____.

A. children learn to share it with us

B. children act the way we want them to

C. children should be thankful to us

D. children should still do what they like

3. Which of the following is C in using ACT technique to deal with a child whose sister refused to play

     with him?

A. Tom,I know you want to play with Lucy.

B. You can play with her tomorrow.

C. But Lucy has to do her homework now.

D. Tom,you shall not disturb Lucy.

4. According to the text,when using ACT technique,we should _____.

A. use it in a loving way

B. behave very seriously

C. make efforts to be angry

D. try to make children satisfied

5. What's the main idea of the text?

A. The relationship between children and parents.

B. The advantages of ACT technique.

C. The way to deal with children.

D. The introduction of ACT technique.

单项选择题