小题1:C
小题2:B
小题3:A
小题4:C
文章关于extreme life extension，并举例说明。
小题1:细节题。倒数第三段I think it helps the absorption of the nutrients。
小题2:细节题。最后一段Since then, he has lost 45 pounds, and he says he hasn’t had a cold in seven years.
小题3:猜测词义题。根据后面的switch可知这里应该是打开的意思。
小题4:推理题。根据文章第二段I am talking in details about allowing us to go into our second century of life with the energy that you have when you are a young person.”可知这里所指的是：长寿和健康。