GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 976RE4CQ7QV6PB25K

Low bone density is the primary risk factor for bone fractures. People with a physically inactive lifestyle provide a case in point: their bone density decreases and, as a result, they become increasingly prone to bone fractures. People who routinely take Omega sleeping pills are also uncommonly prone to bone fractures, even as compared to users of other sleeping pills. Clearly, when data on Omega users' bone density are collected, what they will show is below-average bone density.