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上海市卢湾区自１９９１～１９９５年在全区开展了以“母亲安全，儿童优生”为主题的“三优”工程。为了能摸清０～６岁儿童基本情况，在１９９２年对１２００户进行了抽样调查。在此基础上，制定了三优工程的各项指标，并实施了各项干预措施。经过３年的实践，于１９９５年又?
From 1991 to 1995, Luwan District of Shanghai Municipality launched the “Three Excellences” project with the theme of “mother safety and child eugenics” in the whole region. In order to find out the basic situation of children aged 0-6 years, a sample survey was conducted on 1,200 households in 1992. On this basis, the three indicators of the project were developed, and implemented various interventions. After three years of practice, in 1995 again?