如图所示，一物体质量m=2kg，在倾角θ=37°的斜面上的A点以初速度v₀=3m/s下滑，A点距弹簧上端B的距离AB=4m，当物体到达B后将弹簧压缩到C点，最大压缩量BC=0.2m，然后物体又被弹簧弹上去，弹到的最高位置为D点，D点距A点AD=3m，挡板及弹簧质量不计，g取10m/s²．求：

如图所示，一物体质量m=2kg，在倾角θ=37°的斜面上的A点以初速度v₀=3m/s下滑，A点距弹簧上端B的距离AB=4m，当物体到达B后将弹簧压缩到C点，最大压缩量BC=0.2m，然后物体又被弹簧弹上去，弹到的最高位置为D点，D点距A点AD=3m，挡板及弹簧质量不计，g取10m/s²．求：

    You have probably heard the saying,"When life gives you lemons,make lemonade."Since lemons are considered bitter and lemonade is considered sweet,the saying tells you to make the best out of a bad situation.

    Unfortunately,when something bad happens,it's not uncommon for most people to talk about it to anyone who'll listen,and complain about life,"Why me?"That's like getting a bag of lemons,putting them down,and thinking, "Lemons taste bad!I'd rather have chocolate!"If you don't make anything with the lemons,they will go bad.But what if you did something with them?What if you made lemonade?Isn't it possible to do something similar with a bad situation?

    Here's an example.Let's say you're about to go to the movies,but you discover you have a flat tire（瘪胎）.You consider this a terrible thing. After all,you are really looking forward to spending some time with Ryan Gosling and Emma Stone.Now you're all stressed out,hating the tire,the car,and your life.But what if you called AAA,got your tire fixed or got caught up on things that you'd been meaning to do?What if you did some reading,or had coffee with a friend instead?A negative experience can be turned into something positive.Almost anything can work itself out into something better.You can't change what has happened,right?So make the best of it.I'm not saying it will be easy. The easy thing to do is complain about your bad situation and not consider what it could be turned into.

    Next time when some unfortunate things happen,stop and think,"How can I turn this around?How can I make it a positive experience?You needn't fear difficulties.As long as you keep on changing it,you will see the benefits（好处）at last.