string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=2024%E5%B9%B4%E4%BA%8C%E5%BB%BA%E6%95%99%E6%9D%90%E5%8F%98%E5%8C%96%E5%A4%A7%E4%B8%8D%E5%A4%A7%E4%BA%86 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
2024年二建教材变化大不大了
