人工喂养时，下列哪一点是不恰当的（）

A.按小儿年龄及生理特点调制乳品量和浓度

B.每次喂哺应煮沸消毒食具

C.每日喂哺次数和间隔时间一般与母乳喂哺相近

D.喂哺完毕后应竖抱并轻拍后背

E.3个月以下婴儿可用豆类代乳品

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Of the many over-the-counter medications marketed for the relief of sinus headache, SineEase costs the least per dose. And SineEase is as effective per dose as the most effective of those other medications. So for relief from sinus headaches, SineEase is the best buy.
Which of the following, if true, most seriously weakens the argument above

A．Most of the over-the-counter medications marketed for the relief of sinus headache are equally effective per dose in providing such relief.

B．Many of the over-the-counter medications marketed for the relief of sinus headache contain the same active ingredient as SineEase.

C．People who suffer from frequent sinus headaches are ply advised to consult a doctor before taking any over-the-counter medication.

D．An over-the-counter medication that is marketed for the relief of symptoms of head cold is identical in composition to SineEase but costs less per dose.

E．(E) The per dose price for any given over-the-counter medication marketed for the relief of sinus headache is higher for smaller packages than it is for larger packages.