米娜(Mina)是一位住在德黑蘭(Tehran)、育有兩子的44 歲母親。她說:「就在兩個月前,牛肉一公斤還是700萬里亞爾(約5.33美元),但我前天買已經1900萬里亞爾(14.46美元)一公斤——翻了一倍多。我去年夏末買的伊朗米是170萬里亞爾(約1.29美元)一公斤,現在是380萬(約2.89美元)。」
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The algorithm also visits children in order of distance to the query point. This means it checks the most promising quadrants first, which tends to find a good candidate early and enables aggressive pruning of the remaining quadrants. Without this ordering, the algorithm would still produce the correct result, but it would prune fewer nodes.