Revert "去掉一些无用的注释"

This reverts commit c9b33ece9123b1d7cdb85fa6cf6120cc58f9fb7a.
Revert "Revert "去掉一些无用的注释""

This reverts commit 7fca6b6aea2455bf07b375513d12644391b66e88.
调整代码目录结构