不孕早期症状有哪些？
2～3岁小儿，主食100～200克，豆制品15～25克，肉、蛋50～75克，蔬菜100～150克，牛奶250～500克，水果适量。如果能按上面的量食用，就可以得到较充足的热量和营养。
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