Oil and gas prices jump as conflict escalates
The spatial view (the grid of rectangles) and the tree view (the hierarchy of nodes) represent the same structure. Searching for a point means walking down the tree: at each node, you check which of the four children contains your target coordinate and recurse into that child. You never visit the other three.，推荐阅读同城约会获取更多信息
Что думаешь? Оцени!。heLLoword翻译官方下载对此有专业解读
This is basically a combination of