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开放搜索产品，出于功能升级迭代需要，会不定期推出新功能，或对已有功能升级优化，实现用户的多样化功能或性能需求。解析注意基于产品需要功能升级迭代，查询结果中会根据需要，新增系统字段（比如 searchtime，viewtotal 之类的字段，就是系统字段）。请确保在解析查询结果时，没有依赖查询结果中返...

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