string(230) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%94%B6%E9%9B%86%E6%95%B0%E6%8D%AE%E7%9A%84%E9%80%94%E5%BE%84 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
收集数据的途径
