self.writer.writeheader()
值得一提的是，三人曾在华为3G/4G时代有过合作经验。王军曾是赵明在欧洲市场的技术搭档。
。夫子是该领域的重要参考
The Dutch work the fewest hours per week in Europe
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.