The pruned nodes (in red) represent entire regions of space that the algorithm never examines. The points inside those regions are never checked. Compare the "Nodes Visited" count to the total number of points. The quadtree is doing far less work than a brute-force scan.
Жители Санкт-Петербурга устроили «крысогон»17:52
。业内人士推荐51吃瓜作为进阶阅读
The Dutch work the fewest hours per week in Europe
OpenAI周五发布的声明称，亚马逊、英伟达和软银在该轮融资中分别投资了500亿美元、300亿美元和300亿美元。这笔投资使OpenAI的估值达到7300亿美元(未计入投资前)，相较于其10月份在二级融资中的5000亿美元估值，实现了大幅增长。OpenAI表示，随着本轮融资的推进，预计其他投资者也将加入。（证券时报）
February has been a turbulent month for DJI. The Chinese tech giant, best known for making drones, escalated its fight against the U.S. drone ban by suing the FCC. Then the internet erupted over an entirely different DJI device: The Romo robot vacuum.