string(240) "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%E5%81%9A%E7%9C%9F%E9%A2%98%E6%9C%89%E7%94%A8%E5%90%97 => Failed to connect to 101.89.166.210 port 38089: Connection refused"
注会做真题有用吗
