依赖项注入方式的关键是，在查询数据时，要注入 DAO 将查询的实体的 Class并定义泛型类型。

The key to the dependency-injection approach is that you query data by injecting the Class of the entity that the DAO will be querying, along with defining the generic type.

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有三种类型的工作项用来存储三种类型的人员查询结果。

There are three types of work items used to store the three types of staff query results.

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您可以修改任何查询，通过向查询添加条件可集中查找某一产品区域、一个迭代或为要查找的工作项类型定义的另一个字段。

You can modify any query by adding criteria to focus on a product area, an iteration, or another field that is defined for the types of work items that you want to find.

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