【单选题】
老年夫妇的角色也在发生着变化，丈夫退休后承担家务增多，由于缺乏家务经验，老两口经常吵架，这是由于（ ）导致的心理改变。
①
家庭经济状况问题
②
家庭人际关系问题
③
空槽老年人
④
丧偶老年人
【单选题】
老年人退休以后，与家人接触的时间增多，加上身体不适、家务琐事等诸多家庭事件增加，家庭矛盾也增多，这是由于（ ）导致的心理改变。
①
家庭经济状况问题
②
家庭人际关系问题
③
空槽老年人
④
丧偶老年人
【单选题】
老年人离退休后的心理变化要经历四个阶段，分别是（ ）
①
期待期、退休期、适应期、稳定期
②
退休期、适应期、兴奋期、抑郁期
③
兴奋期、期待期、抑郁期、过渡期
④
退休期、兴奋期、过渡期、稳定期
⑤
以上说法均不正确
【单选题】
佝偻病的发生是由于缺乏（ ）．
①
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②
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③
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④
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