Attention is the window of knowledge. Without it, the sunlight of knowledge cannot shine in. "This is the experience of a well-known scholar. It is a graphic illustration: high concentration, academic achievement, scientific achievement Important conditions for the tree. , therefore,? ['Be sure to focus while studying.', 'No matter what you do, you should pay full attention and focus.', 'Attention is a psychological quality.', 'Not everyone can concentrate.']