(You're healthy, why do you need to know about cancer? This is a cancer prevention knowledge class, only tell you what you can understand! Let you learn to use rationality and science to manage the health of yourself and your family, and understand that cancer is a preventable disease. Learn to know the common cancer knowledge in life, and according to the situation, in what situation and at what stage to conduct scientific screening. Only by learning cancer prevention knowledge and shaping a healthy life can we truly reduce the risk of cancer.)
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