Each item has a label and a value.

每个项都包含标签和值。

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Queries that end with the label(Single) return an individual item of data.

“（全部）”结束的查询会返回数据集合。

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Queries that end with the label(Single) return an individual item of data.

“（全部）”结束的查询会返回数据集合。

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