string(311) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8B%BC%E5%A4%9A%E5%A4%9A%E8%BD%AC%E5%8C%96%E7%8E%87%E7%AA%81%E7%84%B6%E9%99%8D%E4%BD%8E%E6%98%AF%E6%80%8E%E4%B9%88%E5%9B%9E%E4%BA%8B%E5%91%A2 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
拼多多转化率突然降低是怎么回事呢
