题目

Around the world, eggs have been a breakfast staple（重要部分）for all good reasons. After all, an egg is a storehouse of vital nutrients, making it an essential part of a healthy diet. And for those of you who are afraid of having this power food because you're worried that it will add to your weight, remember, one egg contains about 80 calories and about five grams of fat. Hence, smart consumption is a far healthier option.     Eggs are a well-known rich source of protein — an important building block of bones, muscles, skin, and blood. The body uses protein to build and如图，某农业研究所要在一个矩形试验田ABCD内种植三种农作物，三种农作物分别种植在并排排列的三个形状相同、大小相等的矩形中．试验田四周和三个种植区域之间设有1米宽的非种植区．已知种植区的占地面积为800平方米，问：应怎样设计试验田ABCD的长与宽，才能使其占地面积最小？最小占地面积是多少？