A new Rand Institute study suggests obese Americans spent more for their health care than smokers do. Obesity adds almost $400 a year and smoking just 230.

• 兰德机构一项新的调查表明，在美国，肥胖者比吸烟者在保健方面花费更多，胖子每年几乎要花400美元而吸烟者仅花230美元。