参考答案

正确答案：A
解析：推断题。选项B和C的内容作者在文章中并未提到。文章第三段指出和过去相比，贫困状况确实有所改善，尤其是对占人口比重少数的群体而言。但作者接着指出：“The people who have been totally left out of this boom often have medical，mental or other problems for which no one has an immediate solution．”，可见还是有人没有从经济繁荣中获益。所以选项 D也可以被排除。故正确答案为A项。