Objective : To know something about pinworm infection pre-school children in the and rural of Kaifeng.
目的: 了解开封市城乡学前儿童蛲虫感染情况.
That's why it's take themeasure of refrigerating all jams, jellies, and preserves once you've opened them.
这就是为何,果酱 、 果冻和蜜饯一旦开封,就一定要放到冰箱冷藏.
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