呃逆声短促而不得续，伴口干咽燥，食后饱胀，大便干，舌红苔少而干，应辨证为 （）

A.温热中阻

B.胃火上逆

C.津亏热结

D.肝火犯胃

E.胃阴不足

A typical (160) language contains an applicative sub-language which approximates the mathematical abstractions of "timeless" functions applied to "spaceless" values, where the actual operation sequences and use of storage space during expression evaluation are organized behind the (161) . In this setting, values are data structures of low volume, typically a few computer words or less, which means that an illusion of spacelessness can be realized by having (162) results during expression evaluation stored at the discretion of the language implementation, and effecting parameter (163) and (164) operations through value copying.

（160）是（）

A.imperative

B.mandatory

C.compulsory

D.voluntary