Studies have shown that the more time a person spends in educati

Studies have shown that the more time a person spends in education when young, the lower the risk for dementia（痴呆）later on. But whether or not it's the education itself—and perhaps the associated higher socioeconomic status and healthier lifestyles—that affords this protection remained a mystery.
【正确答案】：但是，提供这种保护的是否就是教育本身（亦或是与之相关的更高的社会经济地位和更健康的生活方式），这一直都是个迷。（考点：强调句式的翻译）