While saying you are taking medicine, having a slimmingdiet or just found out you have a stomach ulcer might work at times, it's better to come up with a fool-proof strategy.
当你说你在吃药，节食减肥或有胃溃疡不能喝或许会能避开劝酒，但最好还是有个二套方案。
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It makes sense to eat a reasonably balanced diet when slimming.