（二）对未成年人、老年人、患病的人、残疾人等负有监护、看护职责的人虐待被监护、看护的人的；
const stack = [];
。safew官方版本下载是该领域的重要参考
The tree is rebuilt every frame. For scenes of this scale, quadtree construction is fast enough to rebuild from scratch each frame, though larger simulations may benefit from incremental updates. Each particle queries its neighborhood for potential collisions, typically checking only 5 to 15 candidates instead of all 40. Red highlights indicate colliding pairs.
if (low = high) return; // 子数组长度<=1
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