《素问·上古天真论》所论的养生方法包括()
A.恬恢虚无,精神内守
B.食饮有节,起居有常
C.法于阴阳,和于术数
D.不妄作劳
E.虚邪贼风,避之有时
参考答案:B, C, D
Peter was so excited ______ he received an invitation from his friend to visit Chongqing. [ ]
A. where
B. that
C. why
D. when
)