问题 单项选择题

关于尿毒症患者术前准备,以下说法错误的是()。

A.充分透析是尿毒症患者术前最重要的一项准备

B.透析不仅可以改善血液生化紊乱,而且可以改善高血压及高血容量

C.尿毒症患者多为慢性中重度贫血,Hb60~90g/L,但患者已能耐受,术前输血对患者无益

D.术前应控制血钾于正常范围

E.测血压袖套及静脉通道均置于非动静脉瘘一侧的上肢

答案

参考答案:C

解析:必要的输血,增加血红蛋白,改善血液携氧能力。

阅读理解

阅读理解。

                  

       A sign is another kind of language. Here are some of them that you see on the roads.

       Number One is a sign with the number thirty on it. When drivers see this sign, they must not go at

  more than thirty kilometers an hour. We see this sign when we are getting near a town. Number Two is a

  sign that we're near a crossing. We must drive carefully. Number Three is a sign that there is a bend

  (拐弯) in the road. Again, we must drive slowly and carefully. It is not safe to go around a bend very fast.

  Number Four is a sign that there is another road coming in from the right. There is a junction (交叉) at

  this place. Number Five is a sign that there is a hill and Number Six is a sign that the road gets narrow.

  Drivers must go slowly and carefully. Number Seven has the word "SCHOOL" on it. This is a sign that

  there is a school at the side of the street or the road. Perhaps there are children going to or leaving

  school. So drivers must look carefully and go slowly. Number Eight is a sign with the letter "P" on it. The

  letter "P" means "Parking". At some places, there are the signs "No parking" or "No waiting". If a driver

  leaves his car near one of these signs, a policeman may come and write down the number of his car.

1. At the places where you see Sign 1, _____.

A. you are already out of a town        

B. you still have thirty kilometers to go

C. there must be many houses and buildings not far away

D. there must be a town thirty kilometers away

2. A driver can leave his car _____.

A. near a sign with "P" on it in the daytime           

B. near a sign with "No parking" on it

C. near a sign with "No waiting" if there're no policemen there                

D. near Sign 8 at any time

3. People put these signs on the roads to _____.

A. make driving even safer          

B. show drivers the way      

C. stop cars going too fast            

D. learn another kind of language

单项选择题