美股三大指数收盘涨跌不一,道指涨0.11%,标普500指数涨0.02%,纳指跌0.26%。纳斯达克中国金龙指数收跌1.09%,热门中概股多数下跌,知乎逆势涨近14%。知乎逆势涨近14%,近期,知乎AI搜索产品知乎直答上线“专业搜索”功能,引入维普、知乎精选等专业内容源,涵盖超过5000万篇中英文文献数据,同时,知乎直答的“专业搜索”支持文件上传和超长文件解析,并针对提供单篇精读、指定来源问答等功能...
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