Milk is nutritious, it contains vitamins A and D as well as protein and isn't full of calories.

牛奶很有营养，它富含维生素A和D以及蛋白质，而且不含热量。

To differentiate between letters like " a" and " d" or " a" and " q" , ascenders and descenders should be sufficiently longer.

为了区分字母“a”、“d”或者“a”、“q”，字母的上半部分或者下半部分要拉得足够长。

But this doesn’t make sense for vitamins A and D, which are fat soluble vitamins, meaning

可是维生素A和D是脂溶性维生素.