目的：研究农民收入水平与健康、医疗费用支出之间的关系。
Objectives: to study the relationship between peasant's health and payments which related to their income levels.
众所周知美国的医疗制度一直倍受责难，包括高昂的医疗费用支出和过度治疗。
No one denies that the American system has problems, including its extraordinarily high costs and unnecessary treatments.
结论提高医务人员对涂阴肺结核病人诊断水平，减少病人诊断医疗费用支出。
CONCLUSION To improve diagnosis level for smear negative TB patients and decrease the medical expenditure of the patients.
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