The quadtree is the two-dimensional case of a broader family of space-partitioning data structures. Octrees extend the same idea to three dimensions (splitting cubes into eight children), KD-trees use alternating axis-aligned splits (splitting along x, then y, then x again), and R-trees group nearby objects into bounding rectangles. Each variant makes different tradeoffs between construction time, query speed, and update cost.
事实上克林顿本人对婚姻并不忠诚。他在担任总统期间与白宫实习生莱温斯基持续两年的婚外情被称为“拉链门”丑闻，结果还导致他成为美国历史上第二位遭众议院弹劾的总统。
。关于这个话题，同城约会提供了深入分析
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音頻加註文字，陸劇《甄嬛傳》「馬拉松」如何成為台灣年輕人過年的「文化習俗」？