To assess the effects on vision of mass screening of older people for visual impairment.
评估对老年人视力不全做大规模视力筛检之效用。
Aim To approach the necessity and feasibility of mass screening of colorectal neoplasma for the aged population.
目的探讨高龄人群结肠癌普查的可行性和必要性。
From 1976 to 1983, mass screening and treatment were done in the Yuguan District of Wufeng County, and primary preventive measures were taken.
从1976年至1983年，在五峰县渔关区坚持宫颈癌普查普治，并采取了初步的预防措施。
In fact, the immune system select the most effective one by mass screening of its antibody repertoire, thus identifying the ones that work best.
实际上，免疫系统是通过对其抗体库的大规模筛选而确定最有效的抗体。
Methods: Data of HIV infection and HIV/AIDS cases were collected by using sentinel surveillance, specific epidemiological survey, VCT and mass screening of high-risk populations.
方法：采用哨点监测、自愿匿名咨询检测、重点人群筛查和专题流行病学调查等方法，收集全市艾滋病病毒感染资料和艾滋病病例报告资料。
Methods: Data of HIV infection and HIV/AIDS cases were collected by using sentinel surveillance, specific epidemiological survey, VCT and mass screening of high-risk populations.
方法：采用哨点监测、自愿匿名咨询检测、重点人群筛查和专题流行病学调查等方法，收集全市艾滋病病毒感染资料和艾滋病病例报告资料。
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