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+# Grade Management System
+
+This is a simple and intuitive grade management system written in Java, which can be used to record, query, and analyze student grades.
+
+## Feature Overview
+
+- **Grade Recording**: Prevents duplicate entry of student information and supports inputting student names, student IDs, courses, and grades.
+- **Grade Query**: Supports flexible querying using keywords such as name, student ID, or course.
+- **Grade Statistics**: Provides statistical analysis of student grades for individual subjects.
+- **System Exit**: Offers a secure way to exit the system.
+
+## Module Composition
+
+- `GradeManager.java`: Main program logic, including functions for entering, querying, and analyzing grades.
+- `Student.java`: Defines the student entity class, including student basic information and getter methods.
+- `Main.java`: Program entry point, containing the main function and menu display logic.
+
+## How to Use
+
+1. **Run the Program**: Launch the system by running the `main` method in `Main.java`.
+2. **Operation Menu**: Select the corresponding function from the menu prompt, such as entering grades, querying grades, or analyzing grades.
+3. **Input Information**: Enter student information or query keywords as prompted.
+4. **Exit the System**: Select the exit function to end the program.
+
+## Notes
+
+- This system uses the console for interaction and needs to be run in a terminal or command-line environment.
+- The system does not allow duplicate entry of the same student's grade information.
+
+## Contributions
+
+Pull requests or issues are welcome to improve this project. If you plan to add new features, please create an issue to discuss the requirements first.
+
+## License
+
+This project uses the MIT License. For details, please check the license file in the repository.
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+
+
+# 成绩管理系统
+
+这是一个简单直观的成绩管理系统，使用 Java 编写，可用于记录、查询和统计学生的成绩信息。
+
+## 功能概述
+
+- **成绩记录**：防止重复录入学生信息，支持输入学生姓名、学号、课程和成绩。
+- **成绩查询**：支持通过姓名、学号或课程等关键字进行灵活查询。
+- **成绩统计**：可对学生单科成绩进行统计分析。
+- **系统退出**：提供安全退出系统功能。
+
+## 模块组成
+
+- `GradeManager.java`：主程序逻辑，包含成绩的录入、查询、统计功能。
+- `Student.java`：定义学生实体类，包含学生的基本信息和 getter 方法。
+- `Main.java`：程序入口，包含主函数和菜单展示逻辑。
+
+## 如何使用
+
+1. **运行程序**：运行 `Main.java` 中的 `main` 方法启动系统。
+2. **操作菜单**：根据菜单提示选择对应功能，如录入成绩、查询成绩或统计成绩。
+3. **输入信息**：按照提示输入学生信息，或查询关键字。
+4. **退出系统**：选择退出功能结束程序。
+
+## 注意事项
+
+- 本系统使用控制台进行交互，需在终端或命令行环境下运行。
+- 系统不允许重复录入相同学生的成绩信息。
+
+## 贡献
+
+欢迎提交 Pull Request 或提出 Issue 来改进本项目。如果你计划添加新功能，请先创建 Issue 讨论需求。
+
+## 许可证
+
+本项目采用 MIT 许可证。详情请查看仓库中的许可文件。
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