"Although I am not an expert, this suggests that there needs to be some steps taken to make this area safe," Walker said.
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记者：当前，全球减贫进程面临诸多不确定性和挑战。在减贫和乡村振兴方面，我国有哪些可以与其他发展中国家分享的理念和实践经验？
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.