Additional Include Directories 与 Include Directories的区别

一般小白在使用VS添加第三方库文件的时候，会发现教程在设置Include的相关目录时，有以下两种方式：

1.VC++ Directories -> Include Directories
2.C/C++ -> General -> Additional Include Directories

那这两种方式又有什么不同呢？
Sin_Geek在度娘了一些资料后，从MSDN得到了官方的解释~

The compiler searches for directories in the following order:
1.Directories containing the source file.
2.Directories specified with the /I option, in the order that CL encounters them.
3.Directories specified in the INCLUDE environment variable.

1是默认包含的路径
2中的/I是由C/C++ -> General -> Additional Include Directories设置的路径
3中的INCLUDE是由VC++ Directories -> Include Directories设置的路径