自问自答，结果是龙纹身女孩美版，
那时候可能是查了挪威版所以没看到。
而我之前的描述并不正确，小防雷页后解答。
※ 引述《benpig (压力..　　　　　)》之铭言：
: 至少五年或甚至十年以上的片子，只记得凶手在某次作案的时候，对着被害人说，
: “你们这些人就是因为礼貌，因为我彬彬有礼，所以就让我进来你们家了。”
: 不晓得为什么一直以为是龙纹身女孩，但查了一下似乎不是。
: 一些其他印象：
: 1. 凶手是男的
: 2. 讲那个台词的时候有厨房场景，厨房记得是美式连着客厅的那种，
: 类似这个 https://goo.gl/4PY6Eb
: 请问有人知道是什么片吗？谢谢。
场景是凶手发现似乎有人入侵他家中，并看到主角，
所以邀请主角进入自己的家中。对白：
凶：Mikael. Hi there. Your evening stroll?
主：Yes, that's right. I ... How are you?
凶：Good. I stopped by the hospital on my way home.
Henrik asked me to ask you something.
主：What was that?
凶：Come on in. I will make you a drink.
主角就进去了！
（快转到凶手准备发主角便当之前的演说）
Let me ask you something.
Why don't people trust their instincts?
They sense something is wrong.
Someone is walking too close behind them.
You knew something is wrong.
But you came back into the house.
Did I force you? Did I drag you? No
All I had to do was offer you a drink.
It's hard to believe that the fear of offending can be
stronger than the fear of pain.
But you know what? It is.
And they always come willingly.
And then they sit there.
They know it's all over just like you do.
以下千字对白省略...
不好意思，之前提供错误资讯让大家烧脑。