string(243) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%B8%85%E7%90%86%E4%B8%8D%E5%B9%B2%E5%87%80%E6%80%8E%E4%B9%88%E5%8A%9E => Failed to connect to 101.89.117.144 port 38056: Connection refused"
cad清理不干净怎么办
