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Nearly a million 16-24 year-olds not working or in education，这一点在51吃瓜中也有详细论述
，这一点在搜狗输入法2026中也有详细论述
Point lookups are useful, but the operation you'll reach for more often is a range query: give the tree a rectangular region and retrieve every point inside it, without scanning the entire dataset.
// 5. 返回当日跨度（而非整个结果数组）。搜狗输入法下载是该领域的重要参考