符合HIV抗体不确定判断标准，报告“HIV抗体不确定（±）”，在备注中应注明（）。
A."4周后复检"
B."8周后复检"
C."3个月后复检"
D."半年后复检"
E."1年后复检"
参考答案：A
解析：HIV抗体不确定是指出现HIV抗体特异带，但不足以判定阳性。结合流行病学资料，可以在4周后随访检测，如带型没有进展或呈阴性反应，则报告阴性；如随访期间出现阳性反应，则报告阳性；如随访期间带型有进展，但不满足阳性标准，应继续随访到8周。如带型没有进展或呈阴性反应则报告阴性；满足HIV抗体阳性诊断标准则报告阳性，不满足阳性判断标准可视情况决定是否继续随访。随访期间可根据需要，检测病毒核酸或P24抗原作为辅助诊断。如果出现HIV-2型的特异性指示条带，根据实际情况需用HIV-2型免疫印迹试剂再做HIV-2的抗体确证试验或HIV-2核酸检测，以进一步明确HIV-2感染状态，疑难样品送国家艾滋病参比实验室进一步分析。
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Population growth is determined by the relationship between births and deaths.The growth rate is calculated by the birth rate minus the death rate.If the birth rate is 4%, for example, and the death rate is 3%, the population growing at rate of 1% per year. 2. _____ Historically, families had many children, but average life expectancies are low and many children died young.Improvements in nutrition and public health programs in the past 30 years have led to a drop in the mortality rate and hence to more rapid population growth. 3. ____ Public health programs and improved nutrition over the past 30 years have brought about declines in mortality rates in the developing nations.But fertility rates(出生率)have not declined as quickly, and the result has been high rates of population growth.Reduced population growth depends to some extent on decreased birth rates. 4. ____ Family planning and modern forms of birth control are important mechanisms for decreasing fertility, but by themselves such programs have had rather limited success in most countries where they have been tried.If family planning strategies are to be successful, they must make sense to the people who are supposed to benefit from them. 5. ____ To a great extent, in developing countries people want large families because they believe they need them.In some societies, children are important sources of farm labor, and they may thus make significant contributions to household income.In societies without any social security programs for the aged, children may also provide a vital source of income for their old parents. |