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为了解小学生集体用餐营养状况，保障学生健康成长，我们于1997年4月对市区17所小学生集体用午餐情况作了调查，旨在为下一步的改善工作提供依据。1对象与方法1．1对象：学生午餐由市区3家快餐经营单位供应，就餐小学生2782人，菜单由经营者自定，每份2．50元。选择供应量最多
In order to understand the nutritional status of primary school children in groups and ensure the healthy growth of students, we conducted a survey on the collective use of lunches by 17 primary school students in urban areas in April 1997 to provide the basis for further improvement. 1 objects and methods 1.1 Object: lunch by the city’s three fast-food business units supply, dining 2782 primary school students, the menu by the operator, each 2.50 yuan. Choose the largest supply