一些新的顾虑涌现出来，成了我们如何对待孩子的争论的一部分。
点睛本句的主干是A new set of considerations has come to the fore。as part of...为补语，其中how引导的是介词about的宾语从句。
set在此处为名词，意思是“一组，一套”。如：
He gave me a set of Dickens' novels as my birthday present. 他送给我一套狄更斯的小说作为我的生日礼物。
come to the fore的意思是“突然出现，脱颖而出”。如：
After the election several candidates came to the fore. 选举后，几位候选人脱颖而出。
考点归纳不仅仅动词有宾语从句，介词也有宾语从句，介词宾语从句的引导词有以下几种：
that引导介词宾语从句，但仅限于用在except，but，notwithstanding等少数介词后。如：
He would have helped us but that he was short of money at the time. 要不是他那时缺钱，他一定会帮助我们的。
连接代词和连接副词引导介词宾语从句。如：
I have no definite information yet as to which route he will take. 对于他要走哪条路线，我还没有确切的信息。
名词性关系代词what，whatever，whichever，whoever引导介词宾语从句。如：
The boy was interested in whatever he saw here. 那孩子对在这里看到的任何事物都感兴趣。
The first prize should go to whoever writes best. 一等奖应颁给最优秀的作者。