通过QQ聊天的方式交流是当今中学的一种时尚。以下是一些同学就自己调节情绪和保持乐观健康心态方面的一些心得体会。
阿风：竞选班长失利时，却当了小组长，我很难过，但我对自己说：“没什么大不了，永不言败，笑到最后的才是笑得最好的；再说他人当班长，可能更好为班级服务，这也是一件好事；我更应该做好自己小组长的本职工作，积极为班级出谋划策。”。
阿强：同学误解我搬弄是非，我感到委屈、伤感，控制不住时就独自大哭一场；之后心情又愉悦起来，真是有些喜怒参半感觉。
阿运：每当考试成绩有所退步，我总会提醒自己下次要克服缺点，努力复习，总会成功的。
通过不同的方式，他们的心情都开朗起来。
结合材料回答下列问题： 

    How to find time for yourself

    Do you ever find yourself dying for some time for yourself? Many of us are so busy with work, school, and home life that often there is no time left over to do something that you enjoy. What follows are some ways to find out the necessary time you need to slow down, and enjoy life.

    ____ This is a great one because you can get many things at the same time when you are walking. You're getting exercise, you have time to think or enjoy music, and you're helping to save the environment.

    Arrive early.____Then use this time for yourself: reading, writing, relaxation, thinking, or whatever.

    Buy tickets ahead. Sports, theater, concerts, or any other event you would enjoy. Make the plans with a friend later.____

    Evenings with yourself.____ If others ask you to do things those nights, just tell them you have plans. Use the time for gardening, reading, exercise, or doing nothing!

    ____What are you interested in? Strike while the iron is hot. Look up a club in your area today and join! If you can't find a club, consider starting one yourself!

A. Walk to work.

B. Join a group.

C. Take an education class.

D. Any appointment that you have, plan to arrive 15—30 minutes early.

E. If you want more time for yourself, you can get it.

F. Having the tickets already in your hand will force you to make it happen!

G. Try to save certain weeknights just for you.

硬水中含有较多的可溶性钙和镁的化合物，会给生活和生产带来许多影响。下列软化硬水程度最高的方法是（        ）