本文以上海市中心城区餐饮业的区位选择为研究对象，从理论、实证和机制解析三个方面进行研究。
The paper's research on the location of food service in the central city of Shanghai includes literature review, empirical analysis and theoretical interpretation.
目的全面、系统地掌握和分析芝山城区餐饮业卫生的整体状况，为逐步实施量化分级管理提供第一手资料，为决策机构酝酿新的管理模式提供科学依据。
To learn the hygienic status in catering trade of Zhishan district, provide the firsthand data for quantification management and provide scientific basis for working out new managerial models.
东昌府区城区中小型餐饮单位存在很多卫生问题，小型餐饮业尤其突出。
There are many sanitary problems among Dongchangfu medium and small-sized restaurant, especially small-sized unit.
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