题目

This habit was picked from my teacher back in 1988. Back then it seemed trivial（琐碎）and not likely to make any significant influence on my life.___16___ The habit that has made the greatest influence on my life is scheduling. In my mind, it is the tiny daily habit that indeed can be life-changing. Scheduling is not just about the ordering of tasks throughout the day. ___17___If you are able to design the right schedule and follow it, you are able to gain massive rewards for your work. ___18___However, everything is likely to boil down to the most precious asset（财富）, name已知|a|=3，|b|=2，且|a-b|=b-a，则a+b=________．