string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%B4%A0%E8%B4%A8%E6%8F%90%E5%8D%87%E7%9A%84%E5%85%B7%E4%BD%93%E6%8E%AA%E6%96%BD => Failed to connect to 101.89.143.195 port 38205: Connection refused"
素质提升的具体措施
