说明：  该BOOTKIT是基于NTLDR的文件型BOOTKIT。NTLDR是最接近内核的，而且对它做HOOK，可以避免编写针对各种类型外设的代码，提高通用性。
(The BOOTKIT is based on the NTLDR file type BOOTKIT. NTLDR is the closest to the kernel, but it did HOOK, to avoid the preparation of the code for the various types of peripherals to enhance versatility.)