男，30岁。全身高度水肿4周。查：血浆清蛋白22g/L，尿量800ml/d，尿蛋白5g/d，尿红细胞（++）。患者出现高度水肿的最主要原因是（）
A.肾小球滤过率下降
B.抗利尿激素增多
C.血浆胶体渗透压下降
D.继发醛固酮增多
E.全身毛细血管扩张
参考答案：C
解析：根据病例分析患者最可能是肾病综合征，血浆清蛋白22g/L，故水肿最可能的原因是血浆胶体渗透压下降
| 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 statements is NOT true
A．Retired people could only live on fixed incomes.
B．Retired people are more skillful than young people.
C．Young people are educated in the new technology.
D．Young people are keeping pace with rapid changes.