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问题 单项选择题

动脉粥样硬化时，动脉内膜的早期病变是（）

A.内膜脂斑，脂纹

B.粥肿

C.纤维斑块

D.粥样斑块

E.溃疡形成

答案

参考答案：A

解析：动脉粥样硬化早期于动脉内膜面见黄色帽针头大的斑点或长短不一的条纹，镜下病灶处内皮细胞下大量泡沫细胞聚集。

单项选择题 案例分析题

女性，33岁，因发现血压升高1年入院。CT示右侧肾上腺结节样增生。查体血压170／95mmHg，满月脸，水牛背，皮肤可见紫纹，血钾3.4mmol／L。

最有价值的影像学检查项目是（）

A.CT

B.B超

C.DSA

D.腹部X片

E.ECT
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单项选择题

Bracken, a poisonous weed, is spreading and damaging much pastureland in the Northern Hemisphere. One potentially inexpensive and self-sustaining countermeasure is to introduce natural enemies of the plant; therefore, some scientists have proposed to control bracken by a release of brackeneating moths native to the Southern Hemisphere into brackeninfested areas in the Northern Hemisphere.
If the scientists’ proposal for controlling bracken is adopted, which of the following is a necessary condition for its success

A．That bracken in the Northern Hemisphere grows in approximately the same climates and soil conditions in which it grows in the Southern Hemisphere.

B．That the released moths will feed on weeds other than bracken that are native to the Northern Hemisphere.

C．That the livestock that will return to pastures now lost to bracken will develop immunities to the diseases caused by bracken.

D．That the released moths will survive in sufficient numbers to build a population large enough to reduce bracken and retard its growth.

E．(E) That traditional methods of control, such as burning, cutting, and chemical spraying, will not become less expensive or labor-intensive than they are now.
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