Hurdle Word 3 hintA hunt.
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（一）故意散布谣言，谎报险情、疫情、灾情、警情或者以其他方法故意扰乱公共秩序的；
This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.