string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%B4%A0%E5%87%80%E7%9A%84%E6%84%8F%E6%80%9D%E8%A7%A3%E9%87%8A => Failed to connect to 101.89.117.144 port 38017: Connection refused"
素净的意思解释
