These days, more and more young people wish to be more beautiful, so they turn to plastic surgery(整形手术) for help. They spend thousands of yuan on these painful surgeries to fix(修整) their nose to change their eyelids(眼皮) or to take off weight from their stomachs.

    In fact, most people are not pleased with the way they look. Even the most beautiful actresses often wish they could change something about their looks. Should we live our whole lives believing we are ugly? Why can't we raise our head high and believe that we are as beautiful as others? A smile is beautiful on any face, whether fat, oily or hairy. And a kind heart is much more beautiful than a pretty look.

    So, let's feel grateful(感激的) that we all have beautiful and healthy bodies that do not need surgeries! Today, I call on you to make an easy change: hold your head high! smile and be kind to others. If you do these, you will be full of confidence(自信), beauty, and warmth everywhere you go.

已知链式炔碳C₃₀₀经过适当处理可得含多个（不含）的链状化合物C₃₀₀H₂₉₈，则含的个数为（　　）