string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%80%83%E8%AF%95%E7%9A%84%E6%97%B6%E5%80%99%E5%BF%83%E6%80%81%E4%B8%8D%E5%A5%BD => Failed to connect to 14.18.117.71 port 38133: Connection refused"
考试的时候心态不好
