string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=bps%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%E5%85%86%E7%BD%91%E9%80%9F => Failed to connect to 101.89.117.144 port 38017: Connection refused"
bps等于多少兆网速
