string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B9%8C%E5%90%88%E4%B9%8B%E4%BC%97%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D%E5%91%A2 => Failed to connect to 14.18.117.71 port 38041: Connection refused"
乌合之众是什么意思呢
