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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.，这一点在51吃瓜中也有详细论述
在塔可夫斯基影迷的心中，塔可夫斯基的《雕刻时光》和他的私人日记是读懂这位大师的两大经典。后者有绝版近10年、译自英文的《时光中的时光》。《殉道学》的到来并非简单的重译，而是一次还原和补全。理想国首次引进的俄文直译全本，让此前被英文节选本遗漏、删节的内容完整呈现在中文世界。，更多细节参见同城约会
“Maybe your TikTok’s taken away. But then you go on Roblox. Or you go on Discord and you start talking to people there,” he said. “That’s one of the things that is challenging…kids are super savvy, and so they’ll get around things.”