Dineen participated in a study that lasted seven years in the mid-1980's.

迪恩在八十年代中期曾参与一项持续7年的研究。

Half the participants, including Dineen, were instructed on how to maintain tight control of their blood sugar. The other half controlled their sugar more loosely.

包括迪恩在内的一半参与者被指示如何保持严格控制血糖。另一半的人则控制的更为宽松。