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问题 单项选择题

男性，自幼常发生黄疸，贫血检查证实为遗传性球形细胞增多症，治疗最好采用（）

A.反复多次少量输血

B.糖皮质激素

C.脾切除

D.酌情应用免疫抑制剂

E.可不必治疗

答案

参考答案：C

单项选择题

Many years ago, when I was fresh out of school and working in Denver, I was driving to my parents’ home in Missouri for Christmas. I stopped at a gas station(加油站) about 50 miles from Oklahoma City, where I was planning to stop and visit a friend. While I was standing inline at the cash register, I said hello to an older couple who were also paying for gas.
I took off, but had gone only a few miles when black smoke poured from the back of my car. I stopped and wondered what I should do. A car pulled up behind me. It was the couple I had spoken to at the gas station. They said they would take me to my friend’s home. We chatted on the way into the city, and when I got out of the car, the husband gave me his business card.
I wrote him and his wife a thank-you note for helping me. Soon afterward, I received a Christmas present from them. Their note that came with it said that helping me had made their holidays meaningful.
Years later, I drove to a meeting in a nearby town in the morning. In late afternoon I returned to my car and found that I’d left the lights on all day, and the battery was dead. Then I noticed that the Friendly Ford dealership—a shop selling cars was right next door. I walked over and found two salesmen in the showroom.
"Just how friendly is Friendly Ford" I asked and explained my trouble. They quickly drove a pickup truck to my car and started it. They would accept no payment, so when I got home, I wrote them a note to say thanks. I received a letter back from one of the salesmen. No one had ever taken the time to write him and say thank you, and it meant a lot, he said.
"Thank you" are two powerful words. They’re easy to say and mean so much.

By telling his own experiences, the author tries to show ______.

A．how to write a thank-you letter
B．how to deal with car problems
C．the kind-heartedness of older people
D．the importance of expressing thanks
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单项选择题

下列哪项是呼吸衰竭典型的血气改变

A．PaO2＜60mmHg可伴或不伴PaCO2＞50mmHg

B．PaO2＜60mmHg

C．PaO2＞50mmHg

D．PaO2＜60mmHg　　PaO2＞50mmHg

E．以上均不对
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