患者男，49岁。尿潴留导致膀胱高度膨胀且极度虚弱，一次放尿过多_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题 A1型题

患者男，49岁。尿潴留导致膀胱高度膨胀且极度虚弱，一次放尿过多可导致血尿，其原因是（）

A.腹压急剧下降，致大量血液滞留于腹腔血管内

B.膀胱内压突然降低，导致膀胱黏膜急剧充血

C.操作过程中损伤 * * 内口

D. * * 黏膜发生损伤

E.操作中损伤输尿管

答案

参考答案：B

解析：首次放尿不得超过1000ml，否则会因为膀胱内压突然降低，导致膀胱黏膜急剧充血而出现血尿，因此B是正确答案。腹压急剧下降，致大量血液滞留于腹腔血管内加重病人虚弱，A错误。C、D、E均可导致血尿，但是与大量放尿无关，因此错误。解题关键：掌握一次放尿不得过多的原因。【考点】：一次放尿过多导致血尿的原因

完形填空

短文填空：
用下列所给词的适当形式填空，使短文完整正确。

health , help, much , time, run, relax, away, keep，become, active

Do you like running? Running is __小题1:__one of the most popular activities these days. Many of us run for our___小题2:___. Doctors say many of the health problems come from such bad habits as eating too ___小题3:___,drinking too much, smoking, staying up late and not having enough exercise. Doctors tell us, “Eat less, don’t smoke, have enough sleep and exercise more.” Running is good exercise because it __小题4:___build a strong body. It also helps many people lose weight. One 25-year-old woman teacher runs for half an hour in the morning five ___小题5:__ a week. She runs to lose weight. “I feel comfortable and I’m not fat any more,” she says.
Running is good for health in other ways ,too. Many __小题6:__ say running makes some small health problems go _小题7:___. “Running is my doctor,” says one man.
Running can also help people to __小题8:__. “After school, I like to run for ten minutes. Then I feel _小题9:__ and energetic,” says Yang Li, a middle school student. So today men and women of all ages enjoy running.
Do you want to __小题10:__fit? Come on! Let’s join in the running!

问答题简答题

在线路上产生电压损失的主要因素是什么？