http://www.info.gov.hk/elderly/english/healthinfo/lifestyles/aging.htm
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Everyone will grow old. Normal aging brings about changes in the body and the mind, but many symptoms are not normal and may be due to diseases that can be treated or remedied. Therefore the elderly and caregivers should learn about normal aging, so as to be prepared and to distinguish between disease and normal aging, and seek proper and early treatment for diseases.