The algorithm maintains a running "best distance" that starts at infinity. As it walks the tree, it checks each visited point and updates the best distance if it finds something closer. Before recursing into a child node, it checks whether the closest possible point in that child's bounding box is farther than the current best. If so, the entire subtree gets pruned.
"He is going to make this choice knowing that Donald Trump is watching," he says.
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Amu的經歷反映了台灣外籍移工面臨的弱勢處境，不少人因為債務纏身，而落入國際定義的「強迫勞動」。