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.
第二十四条 已抵扣进项税额的购进货物（不含固定资产）、服务，发生增值税法第二十二条第三项至第五项规定情形的，应当将对应的进项税额从当期进项税额中扣减；无法确定对应的进项税额的，按照当期实际成本计算应扣减的进项税额。
，这一点在旺商聊官方下载中也有详细论述
Jackery Explorer 300
Author(s): Ruixuan Dong, Xiuqin Liu