单项选择题

One thing that needs discussion is the problem of finger pointing in reading an article. Many people consider it to be a very bad habit. Teachers in preschools or kindergartens are continually faced with children whose finger is planted firmly under the words they are learning to read. Children seem to feel that with their finger, they can more easily guide their eyes to the part of the page they wish to read.
Many teachers discourage this, however, insisting that the child take his finger off the page and "read properly. " Why The answer is not clear. I have asked a number of teachers (and teachers of teachers) and the answer usually is that the finger "slows the child down. " This may be true if the child feels safe with his finger under a word and does not wish to move on to the next word. But it is not a perfect answer. For surely if the finger is placed on the book by the child because it helps his eyes, and if the teacher feels that the actual placing of the finger slows the child down, then the answer is not to tell the child to take his finger off the page, but to tell him to speed it up.
If you happen to be a finger-pointer, don’t be too worried--it is a natural habit and, if used properly, may lead to a great increase in reading speed. To begin with, you may find difficulty in speeding up your finger, because you will have become used to a certain rhythm and speed, but if you keep on, solid gains should not be too far away. The passage is concerned primarily with ______.