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Update sentive-words-filter.md
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docs/system-design/security/sentive-words-filter.md

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### Trie 树
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**Trie 树** 也称为字典树、单词查找树,哈系数的一种变种,通常被用于字符串匹配,用来解决在一组字符串集合中快速查找某个字符串的问题。像浏览器搜索的关键词提示一般就是基于 Trie 树来做的。
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**Trie 树** 也称为字典树、单词查找树,哈系树的一种变种,通常被用于字符串匹配,用来解决在一组字符串集合中快速查找某个字符串的问题。像浏览器搜索的关键词提示一般就是基于 Trie 树来做的。
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![](./images/sentive-words-filter/brower-trie.png)
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