string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%BB%9C%E5%B8%A6%E5%AE%BD%E8%B6%8A%E5%A4%A7%E7%BD%91%E9%80%9F%E8%B6%8A%E5%BF%AB%E5%90%97 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
网络带宽越大网速越快吗
