string(248) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E8%AE%AD%E7%BB%83%E7%8B%97%E7%8B%97%E7%9A%84%E8%80%90%E5%8A%9B => Failed to connect to 101.91.112.32 port 38195: Connection refused"
怎么训练狗狗的耐力
