處方中含2% Ephedrine HCl(食鹽價為0.28)及0.5% Chlorobutanol(食鹽價為0.24),依食鹽價法計算以NaCl 為等張調節劑配製該處方200 mL 時,所需之NaCl 量為若干克?
0.11
0.22
0.44
0.66