Yī / shēng / jiàn / yì / tā / xiān / tiáo / zhěng / yǐn / shí / yīn / wèi / xū / bù / shòu / bǔ。

医生建议他先调整饮食，因为虚不受补。

The doctor advised him to adjust his diet first because his weak body could not handle strong tonics.