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【单选题】
According to legend, Aesculapius bore two daughters, Panacea and Hyegeia, who gave rise to dynasties of healers and hygienists. The schism (分离) remains today, in clinical training and in practice and, because of the imperative nature of medical care and the subtlety of health care, the former has tended to dominate. Preventive medicine has as its primary objective the maintenance and promotion of health. It accomplishes this by controlling or manipulating environmental factors that affect health and disease. For example, in California presently there is serious suffering and substantial economic loss because of the failure to introduce controlled fluoridation (加氟作用) of public water supplies. Additionally, preventive medicine applies prophylactic (预防性的) measures against disease by such actions as immunization and specific nutritional measures. Third, it attempts to motivate people to adopt healthful lifestyles through education. For the most part, curative medicine has as its primary objective the removal of disease from the patient. It provides diagnostic techniques to identify the presence and nature of the disease process. While these may be applied on a mass basis in an attempt to 'screen' out persons with preclinical disease, they are usually applied after the patient appears with a complaint. Second, it applies treatment to the sick patient. In every case, this is, or should be, individualized according to the particular need of each patient. Third, it utilizes rehabilitation methodologies to return the treated patient to the best possible level of functioning. While it is true that both preventive medicine and curative medicine require cadres of similarly trained personnel such as planners, administrators, and educators, the underlying delivery systems depend on quite distinctive professional personnel. The requirements for curative medicine call for clinically trained individuals who deal with patients on a one-to-one basis and whose training is based primarily on an understanding of the biological, pathological, and psychological processes that determine an individual's health and disease status. The locus (地方)for this training is the laboratory and clinic. Preventive medicine, on the other hand, calls for a very broad spectrum of professional personnel, few of whom require clinical expertise. Since their actions apply either to environmental situations or to population groups, their training takes place in a different type of laboratory or in a community not necessarily associated with the clinical locus. The economic differences between preventive medicine and curative medicine have been extensively discussed, perhaps most convincingly by Winslow in the monograph The Cost of Sickness and the Price of Health. Sickness is almost always a negative, nonproductive and harmful state. All resources expended to deal with sickness are therefore fundamentally economically unproductive. Health, on the other hand, has a very high value in our culture. To the extent that healthy members of the population are replaced by sick members, the economy is doubly burdened. Nevertheless, the per capita cost of preventive measures for specific diseases is generally far lower than the per capita cost of curative medicine applied to treatment of the same disease. Prominent examples are dental caries (蛀牙) , poliomyelitis(脊髓灰质炎 ) and phenylketonuria (苯丙酮尿) . There is an imperative need to provide care for the sick person within a single medical care system, but there is no overriding reason why a linkage is necessary between the two components of a health care system, prevention and treatment. A national health and medical care program composed of semiautonomous systems for personal health care and medical care would have the advantage of clarifying objectives and strategies and of permitting a more equitable division of resources between prevention and cure. The author's primary co
A.
refute a counterargument
B.
draw a distinction
C.
discuss a dilemma
D.
isolate causes
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【简答题】对下列二叉树 进行中序遍历的结果是 A)ACBDFEG BACBDFGE C)ABDCGEF D)FCADBEG
【单选题】下列( )不是表面活性剂的作用。
A.
洗涤作用
B.
起泡作用
C.
乳化作用
D.
温度调节作用
【单选题】下列哪个不是表面活性剂的作用()
A.
乳化剂
B.
消泡剂
C.
润湿剂
D.
增溶剂
E.
黏合剂
【单选题】对下列二叉树进行中序遍历的结果是
A.
ZBTYCPXA
B.
ATBZXCYP
C.
ZBTACYXP
D.
ATBZXCPY
【简答题】圆盘式车床夹具的夹具体为圆盘形。在圆盘式车床夹具上加工的工件一般形状都较复杂,多数情况是工件的定位基准与加工圆柱面垂直的端面。夹具上的平面定位件与车床主轴的轴线垂直。
【单选题】对下列二叉树进行中序遍历的结果是
A.
ACBDFEG
B.
ACBDFGE
C.
ABDCGEF
D.
FCADBEG
【多选题】以下关于基质的描述正确的有()
A.
为填充于纤维、纤维束间隙和细胞间的无定形物质
B.
网状纤维为其主要成分
C.
基质可形成分子筛立体构型
D.
有利于物质交换和吞噬细菌等异物
【单选题】对下列二叉树进行中序遍历的结果是
A.
ZBTYCPXA
B.
ATBZXCYP
C.
TZBACYXP
D.
ATBZXCPY
【单选题】下列不是表面活性剂作用的是( )
A.
乳化
B.
杀菌
C.
除热原
D.
增溶
E.
润湿
【判断题】圆盘式车床夹具的夹具体为圆盘形。在圆盘式车床夹具上加工的工件一般形状都较复杂,多数情况是工件的定位基准与加工圆柱面垂直的端面。夹具上的平面定位件与车床主轴的轴线垂直。
A.
正确
B.
错误
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