It is true that Americans do not typically plan their births to set an example for developing nations. We are more affected by women's liberation: once women see interesting and well-paid jobs and careers available, they are less willing to provide free labor for child raising. From costing nothing, children suddenly come to seem impossibly expensive. And to the high cost of children are added the uncertainties introduced by divorce, couples are increasingly unwilling to subject children to the terrible experience of marital breakdown and themselves to the difficulty of raising a child alone.
These circumstances—women working outside the home and the instability of marriage—tend to spread with industrial society and they will affect more and more countries during the remainder of this century. Along with them goes social mobility, ambition to rise in the urban world, a main factor in bringing down the births in Europe in the nineteenth century.
Food shortage will happen again when the reserves resulting from the good harvests of 1976 and 1977 have been consumed. Urbanization is likely to continue with the cities of the developing nations struggling under the weight of twice their present populations by the year 2000. The presently rich countries are approaching a stable population largely because of the changed place of women? and they incidentally are setting an example of restraint to the rest of the world. Industrial society will spread to the poor countries and aspirations will exceed resources. All this leads to a population in the twenty-first century that is smaller than was feared a few years ago. For those anxious to see world population brought under control the news is encouraging.
During the years from 1957 to 1976, the birth rate of the United States ______.
A.increased
B.experienced both falls and rises
C.was reduced
D.remained stable
第1题
可能性最大的诊断是
A.交感神经麻痹
B.动眼神经麻痹
C.内眦赘皮
D.重症肌无力
E.先天性上睑下垂
第2题
B、动眼神经麻痹
C、内眦赘皮
D、重症肌无力
E、先天性上睑下垂
为明确诊断可借助的方法A、肌注新斯的明1.0mg
B、荧光血管造影检查
C、裂隙灯检查
D、EOG检查
E、VEP检查
第3题
A、先天性上睑下垂
B、内眦赘皮
C、下颌瞬目综合征
D、儿童型重症肌无力
E、动眼神经麻痹
第4题
A、先天性上睑下垂
B、内眦赘皮
C、下颌瞬目综合征
D、儿童型重症肌无力
E、动眼神经麻痹
第5题
B、动眼神经麻痹
C、慢性进行性眼外肌麻痹
D、重症肌无力
E、先天性上睑下垂
F、腱膜性上睑下垂
问题:为明确诊断可借助的检查方法是()A、新斯的明试验
B、荧光素血管造影
C、裂隙灯显微镜检查
D、眼电图(EOG)检查
E、视觉诱发电位(VEP)检查
F、视网膜电图(ERG)检查
问题:关于重症肌无力的正确描述是()A、是一种自身免疫性疾病
B、少于50%的重症肌无力患者以眼肌型重症肌无力起病
C、神经肌肉接头突触后膜上的乙酰胆碱受体受累
D、乙酰胆碱受体抗体测定对诊断有特征性意义
E、可伴有胸腺异常
F、单纤维肌电图检查有助于诊断
该患者新斯的明试验阳性,乙酰胆碱受体抗体检测阳性,CT检查提示胸腺瘤。 问题:该患者可选择的治疗方法是()A、胆碱酯酶抑制剂
B、糖皮质激素
C、环孢素A
D、静脉注射免疫球蛋白
E、胸腺有异常者,可行胸腺切除术
F、提上睑肌缩短术
第6题
A.重症肌无力
B.动脉瘤
C.眶上裂综合征
D.海绵窦血栓形成
E.肌营养不良
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