If the domain of the function \( f(x)=\sqrt{\log_{0.6}\!\left(\left|\frac{2x-5}{x^{2}-4}\right|\right)} \) is \( (-\infty,a]\cup\{b\}\cup[c,d)\cup(e,\infty) \), then the value of \( a+b+c+d+e \) is _______.