string(294) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%9D%E6%83%B3%E5%BB%BA%E8%AE%BE%E6%96%B9%E9%9D%A2%E7%9A%84%E4%B8%8D%E8%B6%B3%E5%92%8C%E6%94%B9%E8%BF%9B%E6%8E%AA%E6%96%BD => Failed to connect to 125.88.227.171 port 38062: Connection refused"
思想建设方面的不足和改进措施
