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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.，详情可参考旺商聊官方下载
Полина Кислицына (Редактор)，更多细节参见爱思助手下载最新版本
Maternity services under strain as report finds insufficient staffing levels