Children shouldn't watch _______ TV. [ ]

A. too many

B. too much

C. much too

D. many

8个月龄婴儿，因辅食添加不当，腹泻二天，大便呈稀水样，每天7～8次，伴呕吐，吐出物味酸臭，伴尿少，精神萎靡，下列哪项处理不必要()

A．血气分析

B．大便常规

C．补液

D．洗胃

E．查血电解质