中文说明：四阶龙哥库塔方法求解一阶微分方程的数值解法，能自定义迭代步数和迭代精度，非常适合于计算方法的初学者。
English Description：
The fourth-order Runge Kutta method is a numerical method for solving first-order differential equations. It can customize the number of iteration steps and iteration accuracy, and is very suitable for beginners of calculation methods.