string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%8E%B0%E5%9C%A8%E5%81%9A%E4%BB%80%E4%B9%88%E5%B7%A5%E4%BD%9C%E6%9C%80%E6%9C%89%E5%89%8D%E6%99%AF => Failed to connect to 125.88.227.171 port 38062: Connection refused"
现在做什么工作最有前景
