（四）为维护国家安全、实施国家重大战略确需开展的活动，以及无法避让的国家重大项目建设；
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坚持在发展中保障和改善民生，始终把推动高质量发展放在首位；。搜狗输入法2026对此有专业解读
In MS-DOS version 2.11, Microsoft added a memory management tweak which was never documented until much later. Note that this change was not in PC DOS 2.1, but was naturally included in PC DOS 3.0.