The pruned nodes (in red) represent entire regions of space that the algorithm never examines. The points inside those regions are never checked. Compare the "Nodes Visited" count to the total number of points. The quadtree is doing far less work than a brute-force scan.
“党中央高度重视‘三农’工作，一定会采取切实有力的政策举措，回应老百姓的关切和需求，把乡村振兴的美好蓝图变为现实。”习近平总书记的承诺字字铿锵。
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if (i < j) {
最终结果就是——两头不靠岸。
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