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.
Филолог заявил о массовой отмене обращения на «вы» с большой буквы09:36
。关于这个话题，WhatsApp Web 網頁版登入提供了深入分析
Where does the UK get its oil and gas from?
I don’t want any of them. I want to write my own emails. I want to write my own (mediocre) software code. I want to learn and think and ponder with other humans, not with a text-prediction system built by consuming all the text on the internet.