最值得注意的是它说：

Limits on memory and address space
vary by platform,operating system,
and by whether the
IMAGE_FILE_LARGE_ADDRESS_AWARE value
of the LOADED_IMAGE structure and
4-gigabyte tuning (4GT) are in use.
IMAGE_FILE_LARGE_ADDRESS_AWARE is set
or cleared by using the
/LARGEADDRESSAWARE linker option.

另见：http://msdn.microsoft.com/en-us/library/wz223b1z.aspx