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有些场数据完全不需要，比如ddt场，可以通过
find . -name "ddt*" -type f
确认删除的场，然后
find . -name "ddt*" -type f -delete
删除
参考 https://askubuntu.com/questions/377438/how-can-i-recursively-delete-all-files-of-a-specific-extension-in-the-current-di
