医生可能也会建议输血、补充叶酸、抗生素等。

Doctors may also recommend blood transfusions, folic acid supplements and antibiotics.

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这意味着它是为时已晚，采取补充叶酸后，发现是怀孕。

This means that it is too late to take supplementary folic acid after the pregnancy is discovered.

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我们评估了在强化补充叶酸前后神经管缺陷发生率的变化。

We assessed changes in the prevalence of neural-tube defects in Canada before and after food fortification with folic acid was implemented.

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