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.
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赤霉病，被称为小麦的“癌症”。2024年，小麦抽穗扬花期间阴雨连绵，在浙江省东阳市巍山镇施家田村，一埂之隔的两块田，在同等用药防治的情况下，一边发病程度达3—4级，而另一边仅有零星见病，而且病穗上大多仅一两个颖花发病，这块田里栽种的正是大名鼎鼎的“扬麦33”。，更多细节参见爱思助手下载最新版本
Article InformationAuthor, 雷切爾·克倫（Rachel Clun）