问题 单项选择题

患者男性,32岁,既往健康,有烟酒嗜好。 1年前发现左上肢“红线”,伴肿硬,压痛。5个月前感觉右下肢凉、怕冷,麻木,行走200m出现小腿疼痛。近1个月症状加重,出现夜间疼痛。查体:右下肢发绀,皮温凉,右股动脉弹性好,足背胫后动脉搏动未触及。

目前临床分期为

A.第一期

B.第二期

C.第三期

D.第四期

E.第五期

答案

参考答案:A

解析:第一期(局部缺血期)患肢麻木、发凉、轻度间歇性跛行,可反复出现游走性浅静脉炎。检查发现患肢皮温稍低,色泽较苍白,足背或胫后动脉搏动减弱。第二期 (营养障碍期)症状加重,间歇性跛行明显,疼痛转为持续性静息痛,夜间剧烈。检查患肢皮温显著降低,色泽苍白,或出现紫斑、潮红,小腿肌萎缩,足背或胫后动脉搏动消失。第三期(坏死期)症状继续加重,患肢趾(指)端发黑、坏疽、溃疡形成,疼痛剧烈呈持续性。

单项选择题
阅读理解

Internet use appears to cause a drop in psychological health, according to a research at Carnegie Mellon University.

Even people who spent just a few hours a week on the Internet experienced more depression(沮丧) and loneliness than those who used Internet less frequently, the two-year study showed. And it wasn’t that people who were already feeling bad spent more time on the Internet, but that using the Net actually appeared to cause the bad feeling.

Researchers are puzzled by the results, which were completely the opposite to their experiences. They expected that the Net would prove socially healthier than television, since the Net allows users to choose the information and to communicate with others.

The fact that Internet use reduces time available for family and friends may explain the drop in well-being, researchers supposed. Faceless, bodiless “virtual” communication may be less psychologically satisfying than actual conversation, and the relationships formed through it may be shallower. Another possibility is that knowing the wider world via the Net makes users less satisfied with their lives.

“But it’s important to remember this is not about the technology; it’s about how it is used,” says psychologist Christine Riley of Intel, one of the study founders. “It really points to the need for considering social factors in terms of how you design applications(应用) and services for technology.”

小题1:The best title of the passage probably is        .

A.Internet May Cause Depression

B.The Danger of Internet

C.Communication with Others by Internet

D.Puzzled by the Results小题2:Why did the results of research puzzle the researchers?

A.People could choose their information through Internet.

B.They had expected the opposite results.

C.People can communicate with others.

D.They had thought Internet was much healthier.小题3:Which of the following may be the cause of depression?

A.Net users found their living conditions bad.

B.Net users already had mental problems.

C.Deep relationships were formed through Internet.

D.Net users had less time to communicate with other people.小题4:The writer’s attitude towards technology is        .

A.social factors must be considered while using technology

B.technology was to blame for depression

C.the problem doesn’t lie in technology

D.applications and services for technology must be designed