问题 单项选择题

患者,男,34岁,约1周前双眼前出现黑影飘动,2天前视力明显下降。检查:双眼底玻璃体积血,视网膜隐约可见有出血。体格检查无异常发现。该患者最可能的诊断是()

A.视网膜中央动脉阻塞

B.视网膜中央静脉阻塞

C.糖尿病性视网膜病变

D.视网膜静脉周围炎

E.高血压性视网膜病变

答案

参考答案:D

解析:本题是关于视网膜静脉周围炎的临床诊断题。该病多见于青年男性,多双眼发病,眼底玻璃体有不同程度的混浊和出血,视网膜小静脉扩张有白鞘,早期光凝病变区可以预防新生血管的形成。

阅读理解

B

Instead of hitting the beach, fourteen high school students traded swimming suits for lab coats last summer and turned their attention to scientific experiments.

The High School Research Program offers high school students guidance with researchers in Texas A&M's College of Agriculture and Life Sciences. Jennifer Funkhouser, academic adviser for the Department of Rangeland Ecology and Management, directs this four-week summer program designed to increase understanding of research and its career potential(潜能).

Several considerations go into selecting students, including grades, school involvement and interest in science and agriculture. And many students come from poorer school districts, Funkhouser says. "This is their chance to learn techniques and do experiments they never would have a chance to do in high school".

Warner Ervin of Houston is interested in animal science and learned how to tell male from female mosquitoes (蚊子). His adviser, Craig Coates, studies the genes of mosquitoes that allow them to fight against malaria and yellow fever. Coates thought this experience would be fun and helpful to the high school students.

The agricultural research at A&M differs from stereotypes. It's “molecular (分子) science on the cutting edge”, Fnnkhouser says. The program broadened students' knowledge. Victor Garcia of Rio Grande City hopes to become a biology teacher and says he learned a lot about chemistry from the program.

At the end of the program, the students presented papers on their research. They're also paid $600 for their work---another way this program differs from others, which often charge a fee.

Fourteen students got paid to learn that science is fun, that agricuhure is a lot more than milking and plowing and that research can open many doors.

41. The research program is chiefly designed for ________

A. high school advisers from Houston

B. college students majoring in agriculture

C. high school students from different places

D. researchers at the College of Agriculture and Life Sciences

42. It can be inferred from the text that the students in poorer areas ___________.

A. had little chance to go to college

B. could often take part in the program

C. found the program useful to their future

D. showed much interest in their high school experiments

43. When the program was over, the students ____________.

A. entered that college                B. wrote research reports

C. paid for their research              D. found a way to make money

44. The underlined expression " on the cutting edge" in Paregraph 5 means" on the most ________ position".

A. important      B. favourable    C. astonishing       D. advanced

45. What would be the best title for the text?

A. A Program for Agricultural Science Students  B. A Program for Animal Science Students

C. A Program for Medical Science Lovers     D. A Program for Future Science Lovers

填空题