熟读课文，理解内容，重点掌握以下语句：

1、Because the oldest old have a tendency to breathe shallowly, using only the upper lungs,atelectasis of the lung bases can easily occur, therefore, caregivers should encourage the oldest old to take three deep breaths every hour.

2、In the elderly,especially those on antihypertensives and diuretics, hypotension are a majorcause of falls. When giving these drugs the nurses must also take the blood pressure in the standing position.

3、Nurses must be professionally suspicious once they find listlessness,loss of appetite, and weakness in the oldest old.