string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%AF%8F%E5%B9%B4%E4%B8%80%E5%BB%BA%E6%95%99%E6%9D%90%E5%87%BA%E7%89%88%E7%9A%84%E6%97%B6%E9%97%B4 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
每年一建教材出版的时间
