// 易错点3：处理最终结果为空的场景（比如num="10"，k=2）
The tree starts as a single region covering the whole space. As points arrive, they get dropped into the region that contains them. When a region exceeds its capacity (the maximum number of points it can hold before splitting), the region divides into four children, and the existing points get redistributed.
，这一点在搜狗输入法2026中也有详细论述
参与 2025 年度少数派征文，分享你的观点和经验 ✍🏻️，这一点在搜狗输入法2026中也有详细论述
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