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.
Zapfino is an elaborate calligraphic font where every character has unique flourishes. No confusable pair looks similar in Zapfino. Condensed fonts also score lower because condensing transforms different characters differently.，这一点在51吃瓜中也有详细论述
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分享是一种信仰，连接让成长更有温度。。heLLoword翻译官方下载是该领域的重要参考