string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E4%BC%9A%E7%A8%8E%E6%B3%95%E9%A2%98%E9%87%8F%E5%A4%AA%E5%A4%A7%E6%A0%B9%E6%9C%AC%E5%81%9A%E4%B8%8D%E5%AE%8C => Failed to connect to 101.89.117.144 port 38076: Connection refused"
注会税法题量太大根本做不完
