string(232) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=21%E5%B9%B4%E4%BC%9A%E8%AE%A1%E4%B8%AD%E7%BA%A7%E6%94%B9%E5%8A%A8 => Failed to connect to 101.91.112.32 port 38195: Connection refused"
21年会计中级改动
