If you create a directory (folder) on your computer for every client, you can keep all letters, documents and work for that client in one easy-to-find place, just like your paper file folder.

您可以在电脑上为每个客户建立一个单独的文件夹，这样就可以将该客户的信函、文档、工作记录全都放在该文件夹下，就像放在一个纸文件夹中一样，查找起来方便多了。

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This paper introduces the structure of PDF documents, and shows the procedures for file parsing and text extraction from the parsed content streams.

介绍了PDF的文件结构，在此基础上，给出了PD F文件的解析流程，以及从解析后的内容流中提取文本内容的方法。

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