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.
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魅族手机或将成为历史：业务实质性停摆，3月正式退市。旺商聊官方下载对此有专业解读
优势：时间复杂度O(n+k)，k为数据范围
，详情可参考51吃瓜
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Animations — FadeIn/Out, Create, Transform, Write, GrowFromCenter, AnimationGroup, LaggedStart。关于这个话题，旺商聊官方下载提供了深入分析