搜题请搜索小程序“爱下问搜题”
问题 单项选择题

慢性阻塞性肺气肿患者用氧原则是（）

A.每天氧疗时间不少于15小时，睡眠期间不间断

B.每天氧疗时间不少于15小时，进食期间不间断

C.每天氧疗时间15小时以下，做各种活动时不间断

D.每天感觉呼吸困难严重时进行吸氧

E.每天氧疗时间不少于15小时，可在睡眠、进食间断

答案

参考答案：A

解析：慢性阻塞性肺气肿患者，应低流量、低浓度持续性给氧，每天的氧疗时间不少于15小时。睡眠时患者呼吸中枢兴奋性降低而缺氧加重，因此，睡眠时给氧不能中断。

阅读理解与欣赏

给下列句子加线字的读音。

回眸(   )青春的神气，几乎每一瞬间都有鲜花绽放，回眸青春的美妙，几乎每一处都有生命的奔息，无论你选择哪个角度透视青春，都是那么玲珑剔(   )透。
查看答案
改错题
短文改错。
My friend Paul will never forget his chemical teacher.
He was a little man with thick glasses, and he had 
a strange way of making his classes live and interesting.
And his lessons were not easily forgotten.
Paul remembers one of his first lesson from his teacher.
After all the students were in a chemistry lab, the teacher brought 
out three bottles. One was full with petrol, one with castor oil and 
one with vinegar."Now watch carefully," said the teacher.
He filled a cup with some the petrol, some of the castor oil
and some of the vinegar. As the students watched him, he mixes the 
three together. After that, he held up one of his fingers and showed to the
class. He then dipped it into the cup and said" You must do everything as I do it."


1. _____
2. _____
3. _____

4. _____
5. _____
6. _____

7. _____
8. _____
9. _____
10. _____
查看答案