Dogs really are our best friends, according to a Swedish study that says canine ownership could reduce heart disease. 狗狗真的是我们的好朋友，瑞典的一项研究表明，养狗可以减少心脏病发病率。A study of 3.4 million people between the ages of 40 and 80 found that having a dog was associated with a 23% reduction in death from heart disease and a 20% lower risk of dying from any cause over the 12 years of the study. 一项调查了340万40岁到80岁之间的人的研究表明，养狗和23%的心脏病致死率下降有关，这项12年的研究还表明，养狗使研究对象的死亡风险总体下降了20%。Previous studies have suggested dogs relieve social isolation and depression – both linked to an increased risk of heart disease and early death.之前的多项研究都表明养狗能缓解社交隔离和抑郁症，而这两个症状都
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