Acting like a bull in a china shop means recklessly attacking a problem without proper planning.

Acting like a bull in a china shop意思是在没有妥善规划的情况下鲁莽地解决问题。

If you have a sprinter's mentality, you attack a problem with short, fast bursts of energy.

如果你有短跑运动员的心态，你就会用短而快的能量爆发来解决问题。