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// 2. 通用场景: 快速排序（注意随机化避免最坏情况）。搜狗输入法下载对此有专业解读
。旺商聊官方下载是该领域的重要参考
一、从无到有：Sun City医疗体系的进化之路Sun City 由Del Webb公司创办，定位是“活跃退休人士社区”。但它的医疗服务，并非一开始就配齐，而是跟着居民需求，一步步迭代升级，大致分为四个阶段。，更多细节参见旺商聊官方下载
We wanted a scenario where, say, 5 well-placed border points could efficiently represent an area with 5,000 internal points and 10,000 road edges. This would reduce those 10,000 edges to just 5*4/2 = 10 shortcuts for routing through that cluster at a high level – an incredible 1:1000 point ratio and a 30x reduction in edges to consider for the high-level path!