Most but not all of the deterioration was due to high oil prices, raising fresh concerns over the extent to which the US can rely on strong global demand to keep its economy out of recession.

• 造成衰退的大部分原因是高油价，以及不断提升的新的担忧：美国能在多大程度上依靠强大的全球需求使其经济摆脱困境。