new ReadableStream({
（二）在车辆、行人通行的地方施工，对沟井坎穴不设覆盖物、防围和警示标志的，或者故意损毁、移动覆盖物、防围和警示标志的；
，更多细节参见im钱包官方下载
// 随机选基准，避免最坏情况。Line官方版本下载对此有专业解读
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