已知函数 f(x)={1,x≤0,x3+1,x>0,f\left( x\right) = \left\{ \begin{array}{l} 1,x \leq 0, \\ {x}^{3} + 1,x > 0, \end{array}\right.f(x)={1,x≤0,x3+1,x>0, 若对于任意 x≥1,f(∣x−a∣)>f(ax)x \geq 1,f\left( \left| {x - a}\right| \right) > f\left( \frac{a}{x}\right)x≥1,f(∣x−a∣)>f(xa) ,则实数 aaa 的取值范围是( )A. (−∞,1)\left( {-\infty ,1}\right)(−∞,1) B. (−1,+∞)\left( {-1, + \infty }\right)(−1,+∞) C. (−∞,12)\left( {-\infty ,\frac{1}{2}}\right)(−∞,21) D. (−1,1)\left( {-1,1}\right)(−1,1)