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为了解1994年湖南省实施世行贷款方案[1]后控制血吸虫病的效果，以1992年的资料为基线资料，在高度（居民感染率＞15％）、中度（居民感染率＞3％，＜15％）／氏度（居民感染率≤3％）流行区，分别按行政村3％、1％和1％的比例，随机抽查13个、22个和15个流行村（点）进行控制
In order to understand the effect of controlling schistosomiasis after the implementation of World Bank loan program [1] in 1994 in Hunan Province, based on the data of 1992 as the baseline data, , <15%) / degree (Resident infection rate ≤ 3%) epidemic areas were randomly selected according to the ratio of 3%, 1% and 1% of administrative villages to 13, 22 and 15 popular villages control