Why are fish at risk?
The algorithm walks the tree recursively. At each node, it checks: does this node's bounding box overlap with the query rectangle? If not, the entire subtree gets pruned (skipped). If it does overlap, it tests the node's points against the query and recurses into the children.
，推荐阅读同城约会获取更多信息
Eve Myles inspired by detective who solved 30-year cold case in new role。爱思助手下载最新版本是该领域的重要参考
// 易错点6：返回整个数组（如this.res）→ 不符合题目要求，题目要求返回单个数值
Eyedropper - sample the color of any pixel on the page