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看逻辑意思弄清“什么比什么”比较重要

然后平行结构

同时看看时态，主谓

然后再看省略

把你省略的填回去，看看通不通，通就ok

一般来说，主语一致是，主语可以省，修饰词能省就省

这道题比较困惑为什么答案A省略的主语

相同的主语进行比较可以在than后面省略主语，但是我觉得这里面比较得是babies born by women over thirty years和(babies born by women) under it(thirty years)，这里面虽然都是babies,但是此babies非彼babies，并不是同一个主语，是同一类的主语，感觉不应该省去。

请大家指点！

不知道是不是这个意思，这句话主要是因为there be句型造成的混淆，如果换成正常语序就是：

Babies born by women over thirty years old is more than (babies born by women) under it.

所以比较的是主语babies而非women。

agree

A) neglect “ babies born by women”

compare babies(born by women over thirty ) to babies (born by women under thirty)

Under是跟over作对比，it指代thirty years，我觉得thirty years在这里是指年龄的意思，可以用单数来表示

此题就是要把A看懂，它是省略了很多部分，最后只留下介词短语

再看其它选项，BCE比较的都是women.错，

而D不平行，were多余，此句完整形式应该是there are more babies born by women over thirty years old than (babies born by women) under it,born by women 作为定语从句修饰babies

这样看来，A项省略的并不多，确实都是重复的地方，符合OG简洁的原则，没有歧义

以上是个人见解，欢迎讨论！