string(276) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%8F%AF%E4%BB%A5%E7%94%A8%E6%B3%A8%E4%BC%9A%E6%95%99%E6%9D%90%E5%A4%87%E8%80%83%E4%B8%AD%E7%BA%A7%E5%90%97 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
可以用注会教材备考中级吗
