self.file_exists = os.path.exists(csv_path)
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04
，详情可参考im钱包官方下载
There's a tradeoff: a lower capacity means you can skip more space during queries (you zoom in faster), but the tree has more nodes and uses more memory. A higher capacity means fewer nodes but each node requires checking more points linearly. As a starting point, capacities between 4 and 16 are reasonable defaults, though the best value depends on your data distribution and query patterns.
B. User Route Request (Query Time - this is what happens on your device):