Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
dementia – n. a brain disease that causes thinking problems
cognitive – adj. of, relating to, or involving conscious mental activities (such as thinking, understanding, learning, and remembering)
status – n. the position or rank of someone or something when compared to others in a society, organization, group, etc.
mild – adj. not strong in action or effect
impairment – n. a condition in which a part of your body or mind is damaged and does not work well
functioning – n. work or operation
decline – v. to become lower in amount or less in number : to become worse in condition or quality
adequate – adj. enough for some need or requirement : of a quality that is good or acceptable
supplement – n. dietary : a product taken orally that contains one or more ingredients (as vitamins or amino acids) that are intended to supplement one's diet and are not considered food
