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美利達則在巨大事件後宣布全面實施「零付費政策」，並補償現職移工過去支付的仲介費。
Range queries ask "what's inside this box?" But sometimes the question is "what's nearest to this location?" This is the nearest neighbor problem, and you don't know how big your search radius should be. The nearest point might be right next to you or far away.