也有不少五六十岁的老大哥来报名。孙磊通常会直接问一句：“你有多少存款？”
Segmentation maps a logical address (a 16-bit selector plus a 32-bit offset) to a 32-bit linear address, enforcing privilege and limit checks along the way. Paging then translates that linear address to a physical address, adding a second layer of User/Supervisor and Read/Write protection. The two layers are independent: segmentation is always active in protected mode, while paging is optional (controlled by CR0.PG).
，这一点在safew官方下载中也有详细论述
# otherwise we return the type itself.，推荐阅读safew官方版本下载获取更多信息
A little more thinking, and you can derive “early cutoff”