string(282) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%94%B9%E5%8F%98%E8%87%AA%E5%B7%B1%E6%89%8D%E8%83%BD%E6%94%B9%E5%8F%98%E4%B8%96%E7%95%8C%E7%9A%84%E4%BE%8B%E5%AD%90 => Failed to connect to 14.18.46.51 port 38044: Connection refused"
改变自己才能改变世界的例子
