Mother was worried because little Tom was ill, especially    his father HHhhwas away in Canada.  [      ]

A. as          

B. that            

C. during      

D. if

下痢腹痛，赤白相兼，里急后重，肛门灼热，舌苔黄腻。当首选

A．白头翁汤

B．葛根芩连汤

C．芍药汤

D．香连丸