24. 设f(x)f(x)f(x)是定义域为RRR的偶函数,且在[0[0[0,+∞)+\infty )+∞)上单调递减,则满足f(x)<f(x−2)f(x)<f(x-2)f(x)<f(x−2)的xxx的取值范围是((( )))