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As titled, ..., further, all this background or all these background? Thanks a lot.
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Strictly speaking "data" is plural so "these data", however you will very commonly see and hear "data" treated as singular so "this data". I think the distinction is pretty much blurred to point where it doesn't exist in current usage.
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Hi,

all this background or all these background?

this, this, this.Emotion: smile

I'm not clear about why you find this confusing.

Best wishes, Clive