本系统使用一组可事后进行清理的处理程序函数。
This system uses a set of handler functions that can clean up after themselves.
因此，当一组数据被处理完后，程序还可以重复使用。
Thus, when one set of data has been processed, the program can be repeated.
因此，当一组数据被处理完后，程序还可以重复使用。
Thus, when one set of data has been processed, the program can be repeated.
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