string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%AF%95%E4%B8%9A%E8%AE%BA%E6%96%87%E7%9A%84%E6%91%98%E8%A6%81%E5%AD%97%E4%BD%93%E6%A0%BC%E5%BC%8F => Failed to connect to 14.18.117.71 port 38069: Connection refused"
毕业论文的摘要字体格式
