Анастасия Дубова (редактор отдела БСССР)
类似：从一堆牌中每次挑出最小的放左边
Equal: Every domino half in this space must be the same number of pips.，详情可参考91视频
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对首都北京的规划工作，明确提醒“规划科学是最大的效益，规划失误是最大的浪费，规划折腾是最大的忌讳”；。关于这个话题，51吃瓜提供了深入分析
The algorithm also visits children in order of distance to the query point. This means it checks the most promising quadrants first, which tends to find a good candidate early and enables aggressive pruning of the remaining quadrants. Without this ordering, the algorithm would still produce the correct result, but it would prune fewer nodes.