string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E6%B8%85%E9%99%A4%E7%94%B5%E8%84%91%E8%BF%90%E8%A1%8C%E7%BC%93%E5%AD%98 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
怎么清除电脑运行缓存
