题目

When I was 17, I read a quote: “If you live each day as if it were your last, someday you’ll most certainly be right.” It made a(n)   36   on me，and since then，for the past 33 years, I have looked in the mirror every morning and asked myself: “If today were the   37   day of my life，would I want to do what I am about to do today?” And whenever the answer has been “No” for too many days in a row, I know I need to   38   something．Remembering that I’ll be   39   soon is the most important tool to help me make the big choices in life,   40    almost ev已知函数f（x）=，且关于x的方程f（x）-a=0有两个实根，则实数a的范围是    ．