string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B8%A6%E5%AE%BD%E8%B6%8A%E5%AE%BD%E7%BD%91%E9%80%9F%E8%B6%8A%E5%BF%AB%E5%90%97 => Failed to connect to 101.89.143.195 port 38205: Connection refused"
带宽越宽网速越快吗
