Analysis of test questions: the famous saying in the question shows that Mr. Wang should not only teach but also teach people to be human beings, but the most important thing is to teach people to be human beings; Students should not only read books, but also learn the way of life, but the most important thing is to learn the way of life. This embodies the unity of two-point theory and key theory, so item D meets the meaning of the question and can be chosen; A, b and c do not meet the meaning of the question and cannot be selected. So, the answer is D.