A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.
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2026年的开年炸裂，不仅是一个月份的辉煌，更可能是一个新时代的序章，在这个新时代里，中国创新药企将不再是全球医药产业的跟随者，而是并行者乃至引领者，通过持续的技术创新和开放合作，在全球医疗健康事业中贡献中国答案。，推荐阅读Line官方版本下载获取更多信息
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Paste this into your own Python prompt to try it out!