Point lookups are useful, but the operation you'll reach for more often is a range query: give the tree a rectangular region and retrieve every point inside it, without scanning the entire dataset.
食環署也非從未引用現有法律對寵物友善餐廳執法：2025年2月，大埔大元商場一家咖啡廳因兩度被抓獲允許狗隻進入，被法庭定罪罰款後，再被食環署吊銷牌照七天，引起輿論和狗主討論。
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