Ⅱ. 七选五Does a Dog Help a Teen with Low Self­esteem?

　　A dog is known as man's best friend for good reason. Loyal and affectionate, a dog companion can enrich its owner's life in many ways. __51__ Many teenagers suffer from periods of low self­esteem (自尊)as they try to navigate the wavy waters of adolescence and deal with all of its associated highs and lows.

　　A teenager who lacks self­esteem may feel isolated from his peers and unable to tell his parents about personal issues. The company of a dog can be a huge comfort and ease feelings of loneliness and awkwardness. A dog offers genuine unconditional love. __52__

　　All dogs need exercise，so taking his dog for a walk is the perfect opportunity for a teenager to get outdoors and benefit from fresh air and physical activity. Exercise allows people to take control of their bodies，which is often the first step toward regaining control of other aspects of their life，says mental health specialist Dr. Alan Cohen. ____ Exercise releases chemicals called endorphins (内排肽)into the brain, which create positive responses in the body，including improved self­esteem.

　　Dogs can help teenagers be more sociable and make new friends, suggests HELPGUIDE. ____ A dog is a great ice­breaker，avoiding awkward social situations and putting the teenager at ease with people he meets. The more confident the teen becomes when out and about with his dog，the more his self­esteem will improve.

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