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问题 单项选择题 A1型题

男性，45岁，突然呕血400ml并伴黑便。血压13．3／9．33kPa（100／70mmHg），心肺（-），可见腹壁静脉曲张，肝未触及，脾于肋下2cm，可触及。应首选的治疗是（）

A.静脉注射止血药

B.静脉推注奥美拉唑（洛赛克）

C.静脉滴注垂体后叶素

D.静脉滴注代血浆

E.冰盐水洗胃

答案

参考答案：C

解析：呕血、黑便、腹壁静脉曲张、脾可触及，考虑为门脉高压食管静脉破裂出血，治疗首选血管加压素，可降低门脉压。垂体后叶素的主要成分为血管加压素。

单项选择题

Modern industrial society grants little status to old people. In fact, such a society has a system of built-in obsolescence. There is no formal system for continuing our education throughout our life in order to keep up with rapidly changing knowledge. When our education and job skills have grown obsolete, we are treated exactly like those who have never gained an education or job skills and are not encouraged or given the opportunity to begin anew.As a society becomes more highly developed, the overall status of older people diminishes. Improved health technology creates a large pool of old people, who compete for jobs with the young. However, economic technology lowers the demand for workers and creates new jobs for which the skills of the aged are obsolete, forcing older people into retirement. At the same time, young people are being educated in the new technology and are keeping pace with rapid changes in knowledge. Finally, urbanization creates age-segregated neighborhoods. Because the old live on fixed incomes, they must often live in inferior housing. All these factors — retirement, obsolete knowledge and skills, inferior standards of living — lower the status of the aged in society.A century ago, when one could expect to live only to 50 or so, the life span more or less coincided with the occupation and family cycle. But today the average life span allows for fifteen to twenty years of life after these cycles. It appears that our life span is outpacing our usefulness in society.

Which of the following would be the best title for this passage

A．The Problem of Aging

B．Social Structures

C．Economic Technology

D．Continuing Education
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问答题 简答题

电流、电压互感器二次回路有哪些技术要求？
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