问题 单项选择题 B型题

疝环较小,腹压突然升高时疝块变大,不能回纳,但尚未发生血运障碍()

A.易复性疝

B.难复性疝

C.嵌顿性疝

D.绞窄性疝

E.滑动性疝

答案

参考答案:C

解析:易复性疝疝内容物很容易回纳入腹腔。难复性疝疝内容物不能或不能完全回纳入腹腔内。嵌顿性疝疝环较小,腹内压突然增高时,疝内容物可强行扩张囊颈而进入疝囊,随后因疝囊颈的弹性收缩,将内容物卡住,使其不能回纳。疝嵌顿若未能及时解除,肠管及其系膜受压程度不断加重可使动脉血流减少,最后导致完全阻断,即为绞窄性疝。

单项选择题
阅读理解

阅读理解。

     The whole morning we just checked our own things. We were looking for items to give away. We

thought of blankets, food and clothing. Our aim was not to find things we no longer wanted, but things

we use every day and would be useful to others.

     We made up boxes with the things and added some small toys. Inside the boxes a simple letter was

placed, reading:

     "Please take these items and know that your life is important. Times are difficult but they will pass.

We share what we have, believing it will matter. Use the blanket to stay warm. Be safe and know that the

human spirit can overcome anything. Don't hold your head down. Someday please do the same when you

can. How you do it and when, your heart will tell you.

    This kind act was not because the phone rang or for any reason. It was simply because it was the right

time to do. We have often seen homeless people at the park where we left the belongings. The city would

say that it isn't a problem but I see the lives walking to and from it.

     I noticed that my wife had put her favorite green coat into one of the boxes. I asked if she was sure

about it and she simply replied that it had a hood (风帽). She liked the coat but knew the hood could shelter

(遮挡)someone from the rain.

     We don't know where these gifts of compassion (同情) will go. We never go back and see what

happens. It's unimportant. The right things will find the right people and that is all that counts. On the way

my wife started to cry. When I asked why, she said because some things felt so right.

1. What can we learn from the first paragraph about the couple?

A. They had deep feelings of their work

B. They often threw the useless daily items away

C. They liked helping others by sharing their things

D. They often gave away the daily items they didn't use

2. The couple placed the letter inside the box mainly to______.

A. help the poor go through the difficulties

B. let the poor know who gave away the things

C. tell the poor how to use the items correctly

D. tell the poor to pass on the spirit to others

3. The couple liked this kind act because _______.

A. they thought it was the right thing to do

B. they had a good habit of saving things

C. they often received telephone calls for help

D. they hated being troubled by homeless people

4. What's the best title for this passage?

A. Boxes filled with compassion

B. Good behavior leading to happiness

C. The most important thing in our life

D. Happiness coming from sharing things