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PUBLIC MARKS from jackiege with tags data & cost

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处理用户的数据方式、搜索广告&背景广告、人才之战、控制成本；雅虎公司所面临的最主要的挑战，就是要如何用更有针对性的方法，将丰富的信息转化成更多的收入。同时要使每月4.25亿访客能够重新回到网站，而不仅仅是为了搜索信息而来。

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