Варвара Кошечкина (редактор отдела оперативной информации)
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2016 年秋天，苹果拿掉 iPhone 7 的 3.5mm 接口，随之而来的，是 AirPods 的横空出世。苹果通过无线连接、入耳检测、空间音频等技术，对听觉体验进行了一波大升级，虽然 EarPods 没有被立刻抛弃，还能正常使用，但实际上，你需要购买 AirPods，才能获得升级后的体验。
The algorithm maintains a running "best distance" that starts at infinity. As it walks the tree, it checks each visited point and updates the best distance if it finds something closer. Before recursing into a child node, it checks whether the closest possible point in that child's bounding box is farther than the current best. If so, the entire subtree gets pruned.