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根据短文内容，从下框的A—F选项中选出能概括每一段主题的最佳选项，并在答题卡上将该选项涂黑，选项中有一项为多余项。

    Research shows that pets help reduce stress．Do you know why and how?

    For those who love animals,  it's virtually impossible to stay in a bad mood when a pair of loving puppy eyes meets yours, or when a super - soft cat rubs up against your head． Research supports the mood - enhancing benefits of pets．A recent study found that men with AIDS were less likely to suffer from depression if they owned a pet． According to a study, men with AIDS who had pets were only about 50 percent more likely to report symptoms of depression, compared to men with (AIDS who didn't have pets．）

    While ACE inhibiting drugs can generally reduce blood pressure, they aren't as effective on controlling spikes in blood pressure due to stress and tension．However, in a recent study, a group of patients who got dogs or cats were found to have lower blood pressure and haut rates than those having no pets．When they heard of the results, most of those in the non - pet group went out and got pets !

    Whether we walk our dogs because they need it, or are more likely to enjoy a walk when we have companionship, dog owners do spend more time walking than non - pet owners, at least if we live in an urban setting．Because exercise is good for stress management and overall health, owning a dog can be credited with increasing these benefits．

    When we're out walking, having a dog with us can make us more approachable and pave people a reason to stop and talk, thereby increasing the number of people we meet, giving us an pop corduroy to increase our net - work of friends and acquaintances, which also has great stress management benefits．

    Peels can be there for you in ways that people can't．They can offer love and companionship, and can also enjoy comfortable silence, keep secrets and are excellent companions．And they could be the best killer to loneliness．In fact, research shows that nursing home residents reported less loneliness when visited by dogs than when they spent time with other people !  All these benefits can reduce the amount of stress people experience in response to feelings of social isolation and lack of social support from people．