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问题 单项选择题 A2型题

男性，45岁，腹胀2个月，查体：腹壁静脉曲张，腹水征（+），脾大。该患者腹壁静脉血流方向为（）

A.脐上、脐下皆下行

B.脐上、脐下皆上行

C.脐上下行，脐下上行

D.脐上上行，脐下下行

E.由脐部向四周放射状流行

答案

参考答案：D

单项选择题

Many theories concerning the causes of juvenile delinquency (crimes committed by young people) focus either on the individual or on society as the major contributing influence. Theories (51) on the individual suggest that children engage in criminal behavior (52) they were not sufficiently penalized for previous misdeeds or that they have learned criminal behavior through (53) with others. Theories focusing on the role of society suggest that children commit crimes in response to their failure to rise above their socioeconomic status, (54) as a rejection of middle-class values. Most theories of juvenile delinquency have focused on children from disadvantaged families, ignoring the fact that children from wealthy homes also commit crimes. The latter may commit crimes (55) lack of adequate parental control. All theories, however, are tentative and are (56) to criticism. Changes in the social structure may indirectly (57) juvenile crime rates. For example, changes in the economy that lead to fewer job opportunities for youth and rising unemployment (58) make gainful employment increasingly difficult to obtain. The resulting discontent may in turn lead more youths into criminal behavior. Families have also (59) changes these years. More families consist of one-parent households or two working parents; consequently, children are likely to have less supervision at home (60) was common in the traditional family structure. This lack of parental supervision is thought to be an influence on juvenile crime rates.

55().

A.on 

B.in 

C.for 

D.with
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单项选择题

恶性淋巴瘤行67Ga显像，下列正确的是（）。

A.一般采集24小时时相，以取得更好的图像质量

B.选用低能平行孔准直器

C.腹部检查前做好肠道准备

D.检查前1周开始服用铁制剂

E.一般采集93keV、184keV、296keV及388keV四个能峰
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