然而，屏幕使用时间越长，幸福感越低。
However, higher doses of screen time were clearly associated with lower happiness.
术前营养状态越差的患者，营养支持使用时间越长，摄入能量越高。
The patients with worse nutritional status were given longer duration of nutrition support and higher energy intake.
信用卡使用时间越长信用值会越高，所以不要图新鲜就把老卡都消了。
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