问:我知道吃鱼对心脏有好处。但我因腿有些毛病走动不便,因此无法常到市场里食品杂货店去购买,而且新鲜鱼的价格有点贵,请问吃罐头鱼对心脏有好处吗?读者杜先生 Q: I know that eating fish is good for the heart. However, because of my inconvenience of walking on some legs, I can not go to the grocery store in the market to buy, and the price of fresh fish is a little expensive. Is it good for the heart to eat canned fish?