PHE said it had also improved its app so that it could mark the content of sugar, salt and fat in food and drinks. Dr Alison Tedstone told the BBC she hoped the campaign would help parents to choose healthier snacks for their children.  “If you wander through a supermarket, you can see much more goods being sold as snacks than ever before，” she said, “It's a common phenomenon that kids' lunchboxes are full of snacks, leading to a lot of calories for lunch. Our research shows that parents usually appreciate a rule of thumb (经验法则). However, they are surprised to know how much sugar their children are consuming in snacks now.”

Justine Roberts, founder of Mumsnet, said, “The intake  (摄入量) of sugar that kids are getting from snacks and sugary drinks alone is pretty astonishing, and it can often be difficult to distinguish which snacks are healthy and which are not. The rule of thumb from Change4Life can help parents make their decision correctly and wisely.”

体裁：说明文　题材：健康饮食　主题：控制孩子的含糖零食

【语篇解读】　本文是一篇说明文。调查显示，英国小学生平均每天至少吃三份含糖零食，这意味着这些孩子消耗的糖是推荐的最大量的三倍。对此，英国公共卫生部门发起了一项名为Change4Life的活动，鼓励父母们寻找健康零食，并将其限制在每天两份。