尽管很多从业者都关注到老年人的情感陪伴需求，但他们调研过一部分老年人使用群体，大多数人对AI陪伴玩具的刚需还是集中在健康管理和安全上，情感端依赖真人陪护，因此对AI玩具的接受度还在早期。
bucketArr[j] = curr-val;
。Line官方版本下载是该领域的重要参考
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Now that we can build the tree, let's use it to search. Finding a specific point means starting at the root and asking: which child quadrant contains this coordinate? Then you recurse into that child and ask again. Each level of the tree cuts the search space by roughly three-quarters.