问题
单项选择题
The nurse is teaching a group of women to perform breast self-examination. The nurse should explain that the purpose of performing the examination is to discover（）
A. cancerous lumps.
B. areas of thickness or fullness.
C. changes from previous self-examinations.
D. fibrocystic masses.
答案
参考答案：C
解析：
Women are instructed to examine themselves to discover changes that have occurred in the breast. Only a physician can diagnose lumps that are cancerous, areas of thickness or fullness that signal the presence of a malignancy, or masses that are fibrocystic as opposed to malignant.
重度磨损不均匀，未探及穿髓孔，热测引起疼痛并持续2分钟，叩（-），该患牙处理原则为（）。