求翻译：问卷调查的地点是上海市三所三甲甲级儿童专科医院。具体的样本选取是：A医院内科二个病区、外科一个病区、骨科、五官科各一个病区，以及心脏内科一个病区作为样本病区，对样本病区内所有患者进行普查。每个病区抽样量均为100份，合计为600份。另外，对B医院和C医院的相关病区分别调查120份，总样本量达到840份。研究对就诊的儿童患者进行了问卷调查，总样本量达840份，有效问卷为777份，成功率92.5%。是什么意思？

Survey at three Shanghai three Grade Children's Hospital. The specific sample selection: two wards of a hospital medicine, a surgical one ward, orthopedics, ENT ward and a ward of the Department of Cardiology as a sample of wards, samples of disease in patients with the census. Sampling the amount o

The Site Survey 3 the city of Shanghai is a 3 class-A children's hospital. The sample is selected: A doctor 2 Ward, surgical ward, a orthopaedic surgery, division 5, of a heart medicine, as well as a disease as a model disease area of the sample area, and all patients in the district to conduct surv

The questionnaire survey place is the Shanghai three sanchia a-grade child faculty hospital.The concrete sample selection is: The A hospital internal medicine department two wards, a surgical department ward, orthopedics, five senses branch each ward, as well as a heart internal medicine department

Questionnaire is KAB in Shanghai III class a children's Hospital. Specific sample selection are: a one of two hospital internal medicine ward, surgery ward, orthopaedic, facial features one ward, Ward and cardiac medical wards as samples, sample screening all patients in the ward. Each ward sampling

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