static void Main(string[] args)
        {
            do
            {
                Console.WriteLine("请输入问题：");
                string questionStr = Console.ReadLine();
                questionStr = questionStr.Replace("吗", "")
                                         .Replace("?", "")
                                         .Replace("？", "")
                                         .Replace("我", "你");

                Console.WriteLine($"答案如下：");
                foreach (var item in questionStr)
                {
                    Console.Write(item);
                    Thread.Sleep(new Random().Next(200, 2000));
                }
                Console.WriteLine();

            } while (true);
        }