string(330) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%93%8D%E9%81%8F%E8%A1%8C%E4%BA%91%E4%BB%8E%E8%BF%99%E4%B8%AA%E6%95%85%E4%BA%8B%E4%B8%AD%E6%88%91%E6%98%8E%E7%99%BD%E4%BA%86%E4%BB%80%E4%B9%88%E9%81%93%E7%90%86 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
响遏行云从这个故事中我明白了什么道理
