await writer.ready;
candidate.weight = 1.0 / distance to candidate
，这一点在旺商聊官方下载中也有详细论述
Mark Carney and Pierre Polievre offered condolences after nine people were shot dead in the town of Tumbler Ridge in British Columbia.
// ⚠️ 易错点5：循环范围写错（比如i<right或ileft），导致最值计算不全