比如说，北京地区的只可以显示北京的数据，上海地区的只可以显示上海的数据，用北京地区的账号登陆在地区下拉框中就不会显示上海的选项，只有北京的，但是地区的下拉框是全局控件，如何实现这个功能啊data:image/png;base64,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查询结果是按照这个所选择的地区查询的
