159. Ask anyone why there is an obesity epidemic and they will tell you that it's all down to eating too much and burning too few calories.
译文
随便问一个人为什么他会患上肥胖症时,他们都会告诉你,“那都是由于平时吃得太多而消耗的热量又太少”。
点睛
本句是个并列复合句,主干是Ask anyone why...and they will tell you that...。why引导的从句作anyone的宾语补足语;that引导的从句则作you的宾语补足语。
be down to意为“可归因于,因为”。如:
How much sleep you need could be down to one gene. 人需要多少睡眠时间可能归因于一种基因。
考点归纳
与few相关的短语在
六级考试里也很常见:

a good few意为“相当多,不少”。如:
I've turned down a good few job offers. 我已经拒绝了不少工作机会。

a very few意为“极少数”。如:
Only a very few people can understand his new theory. 只有极少数人能理解他的新理论。

no fewer than意为“不少于,多达”。如:
There were no fewer than a thousand people in the hall. 大厅里有多达1000人。

quite a few/not a few意为“相当多,不少”。如:
Quite a few people came to the New Year Concert. 有相当多的人来听新年音乐会。

some few意为“有一些;颇有几个”。如:
Some few of the students are absent today. 有些同学今天缺席。