【正确答案】 1、Y    

【答案解析】[题眼] Major depressive episodes happen to women earlier than men．
[定位] 第1个小标题Types of Depression部分的第2段第l句：Depression occurs at all ages, although major depressive episodes peak between the ages of 55 and 70 in men and 20 and 45 in women．
[解析] 从原文的数据可知，女性重性抑郁症达到高峰的年龄比男性的要早，且时间也更长。题目对男女重性抑郁症出现的时间进行了比较，所述可从原文该句推断出，因此本题答案为Y。