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。下载安装 谷歌浏览器 开启极速安全的 上网之旅。对此有专业解读
"""SQLite存储实现"""
The file security features can help you protect your digital property by allowing you to put PDF stamps, set download limits, and SSL encryption.
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.