所谓的营养蛋，据专家在此前采访中的介绍，指的主要是以高碘蛋、高锌蛋、高钙蛋、高铁蛋、高维生素蛋等为代表的鸡蛋，这些鸡蛋之所以宣称营养价值特别高，主要是因为在鸡的养殖过程中在鸡饲料中加入了碘、锌、
I need help开发者_如何学Python in optimizing the following query. It is taking a long time to finish. It takes almost213 seconds. because of some constraints, I can not add an index and have to live w
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