according to me指的是“在我看来，依我之见”，重点强调的是观点，如：
According to me, its may be an OS problem.
根据对我来说，它可能是操作系统的问题。
According to me, the culture of China is different than any other culture of the world
对于我而言，中国文化是非常独特的，和世界各地其他的文化有很大的不同。
as for me指的是“如果是我，就我而论，对我来说”，如：
As for me, I'd prefer this one to all the rest.
要是我，我会首选这个。
As for me, I have always been taking care to have proper sleep and relaxation.
至于我，我一直有适当的睡眠和放松。
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