Create indexes over the fields in data stores that are frequently referenced by query criteria.

创建索引查询数据在存储领域中经常引用的标准。

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If the quality of each study was assessed using explicit criteria, the criteria that were used should be described or referenced under 'Methods'.

如果每个研究质量均用明确的标准进行评价，那么应当在‘方法’部分对该使用的标准进行描述，或是给出参考文献。

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