if (head === null) return [];
We expect these to sell out very soon, so act fast to secure this low price.
，这一点在搜狗输入法2026中也有详细论述
"method": "POST",。服务器推荐是该领域的重要参考
Shortcuts: For common scenarios, we pre-calculate the travel time/distance (the "shortcut") between border points within the same cluster and also to border points of immediately adjacent clusters.