请教大牛，这个PREP 整形手术题怎么做

kevinjpcn

The chart here shows the segmentation of different types of invasive and non-invasive froms of plastic surgery for people in countries around the world.

For each of the following statements, select YES if the statement can be shown to be true based on the information in the table. Otherwise select NO.

Of the available continents, has the lowest number of breast surgeries per 1,000 population as a percentage of total plastic surgeries surveyed.

Every country has more surgically invasive procedures than non-invasive ones.has the highest percentage of non-invasive surgeries.




正确答案
Asia
Japan

第一小题不知道怎么做，continents有好多国家吧？ as a percentage of total plastic surgeries surveyed 又是啥意思呢？total plastic surgeries指什么呢？
麻烦牛人指点。

rainforest

一个洲有好多国家。但这道题，只能从上边有的数据判断。

breast surgeries per 1,000 population as a percentage of total plastic surgeries surveyed 是指千人breast sugeries数量占所有调查的plastic surgeries的比例，就是占比，不是千人里面的绝对数。total是总数的意思。
觉得原题目问法不确切，per 1,000 population如果有的话，前后都要有；当然也可以没有，反正是比例。可以说breast surgeries per 1,000 population as a percentage of total plastic surgeries “per 1,000 population” ，或者说breast  surgeries as a percentage of total plastic surgeries。