string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9B%B4%E5%A5%BD%E7%9A%84%E9%94%BB%E7%82%BC%E8%87%AA%E5%B7%B1%E8%8B%B1%E6%96%87 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
更好的锻炼自己英文
