除了政策限制正在有序解除，促使整车厂转向L4的现实推手是供应链。硬件层面，激光雷达成本大幅下降、高算力芯片规模化应用，特别是大模型让智驾研发提速，厂商们发力L4的时机已经成熟。
// 易错点1：边界处理 - 空链表直接返回空数组。关于这个话题，91视频提供了深入分析
"itemsAddedOrUpdated": [，更多细节参见爱思助手下载最新版本
The dashed circle shows the current best distance. As the algorithm finds closer points, the circle shrinks, which causes more subtrees to fail the "could contain a closer point?" test and get pruned. The search usually gets cheaper as it progresses.