患者，男性，58岁，左侧肢体乏力2天，高血压病6年，吸烟20年，TC_爱下问搜题

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问题单项选择题 A2型题

患者，男性，58岁，左侧肢体乏力2天，高血压病6年，吸烟20年，TCD显示右侧大脑前动脉、大脑中动脉血流速度增快，分别为210cm/秒及140cm/秒，频谱信号中可见涡流，伴有血管杂音，左侧大脑前动脉血流速度增快（160cm/秒），伴有涡流及粗糙杂音，本患者考虑的诊断是（）

A.右侧大脑前动脉狭窄

B.右侧大脑中动脉狭窄

C.左侧大脑前动脉狭窄

D.颅内多发脑动脉狭窄

E.左侧大脑中动脉狭窄

答案

参考答案：D

解析：脑血管狭窄的主要TCD表现为狭窄段血流速度增快，狭窄远端血流速度降低，侧支循环血流异常，频谱图异常，可闻及杂音。该患者右侧大脑前动脉、大脑中动脉及左侧大脑前动脉血流速度均有增快，伴有涡流和杂音，故考虑颅内多发脑动脉狭窄。

完形填空

Once there lived a rich man 小题1: wanted to do something for the people of his town. But first he wanted to find out whether they deserved his help.

In the centre of the main road into the town, he placed 小题2: very large stone. Then he 小题3: (hide) behind a tree and waited. Soon an old man came along with his cow.

“Who put this stone in the centre of the road?” said the old man, but he did not try to remove the stone. Instead, with some difficulty he passed around the stone and continued on his way. 小题4: man came along and did the same thing; then another came, and another. All of them complained about the stone but not tried to remove 小题5: . Late in the afternoon a young man came along. He saw the stone, 小题6: (say) to himself, “The night 小题7: (be) very dark. Some neighbors will come along later in the dark and will fall against the stone.”

Then he began to move the stone. He pushed and pulled with all his 小题8: (strong) to move it. How 小题9: (greatly) his surprise was at last! 小题10: the stone, he found a bag of money.

单项选择题 A1/A2型题

为减少局麻药的吸收，常添加肾上腺素，适宜的浓度为（）。

A.1：200万

B.1：20万

C.1：2万

D.1：0.2万

E.1：50万