string(330) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8D%8E%E5%8D%97%E5%86%9C%E4%B8%9A%E5%A4%A7%E5%AD%A6%E7%A0%94%E7%A9%B6%E7%94%9F%E7%BD%91%E4%B8%8A%E7%A1%AE%E8%AE%A4%E6%97%B6%E9%97%B4%E6%98%AF%E5%A4%9A%E4%B9%85 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
华南农业大学研究生网上确认时间是多久
