After you're finished, close the parser to release any resources it's holding onto and reset it for the next document.

完成遍历后，关闭解析器以释放它所持有的任何资源，并且重置解析器以便用于下一个文档。

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The next document you process will contain the new attribute keywords, allowing you to do full-text search in the XPath queries.

您处理的下一个文档将包含新属性keywords，它允许您在XPath查询中执行全文搜索。

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Second, it allows you to change a document, even remove it, without having your code fail when you proceed to the next document.

其次，它允许您更改文档，甚至删除文档，而您处理下一文档时代码不会失败。

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Second, it allows you to change a document, even remove it, without having your code fail when you proceed to the next document.

其次，它允许您更改文档，甚至删除文档，而您处理下一文档时代码不会失败。

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