关于双定语的表示法

Pussel

例句：

Your recent services to one of the royalhouses of Europe have shown that you are one who may safely be trusted withmatters whichare of an importance which can hardly be exaggerated.

我的理解：红蓝两块儿都是修饰matters的后置定语。

之后我查看参考书，查双定语结构，发现类似如下，但还是有些不同：

When you get a personal E-mail address, you can receive and send messages to people (whom) you know and those (whom) you want to know.

此处两个并列的限制性定语从句，由 whom引导，都是来修饰people的，但是中间由and联接，且第二个定从前还加了一个those代词。

是这两种表示方法都OK呢，还是例句中的不够规范？

小妹请教各路能人啦

Sherry豆

太棒了

我为快乐狂

哇哦