美国最大的保险公司联合健康集团长久以来一直在拓展业务范围。

UnitedHealth Group, the biggest health insurer, has been extending its reach for some time.

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现在，我们想拓展我们的业务范围。

Now we are planning to extend our range.

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现在，我们想拓展我们的业务范围。

Now we are planning to extend our range.

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