string(274) "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%E6%96%97%E7%8B%97%E7%9A%84%E8%83%86%E9%87%8F%E5%92%8C%E8%80%90%E5%BF%83 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
怎么训练斗狗的胆量和耐心
