string(330) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E5%86%8C%E5%8A%A9%E7%90%86%E5%AE%89%E5%85%A8%E5%B7%A5%E7%A8%8B%E5%B8%88%E6%98%AF%E5%88%9D%E7%BA%A7%E8%BF%98%E6%98%AF%E4%B8%AD%E7%BA%A7%E8%AF%81%E4%B9%A6 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
注册助理安全工程师是初级还是中级证书
