An interactive intro to quadtrees

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But engineers want water in their pipes, not fish.

曾经的骆驼湾村,“九山半水半分田,石头缝里难挣钱”,进村的路,是坑坑洼洼的黄土路。

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If it’s about work, and you want to discuss something in more length and detail, consider an in-person meeting, a phone call, or email instead.

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