Twenty six healthy males, 60-70 years old, having the same vitamin C nutritional status detected by saturation test were selected for this study. They were divided into 4 groups and supplemented orally with various amounts of vitamin C for 15 days. The intake of each group was 59, 94, 149 and 223 ing/day per capita respectively. After comparing the vitamin C contents of 4-hour saturation test urine and early morning 1 hour fasting urine at the end of the experiment, it seems that the optimal daily requirement for the elderly is about 95 mg, and the saturated daily requirement is a little higher than 223 mg.

Construction of medical alliances could help structural adjustment of medical resources, promote the shift of medical and health investment to primary level, improve the overall effectiveness of the medical service system, and better meet the health needs of the people. Guangzhou has established a multi-form and multi-level medical alliance system in accordance with local conditions. According to the distribution characteristics of medical resources in the districts under the jurisdiction of Guangzhou, these districts were divided into areas of controlled development, those of stable development and those of encouraged development. Different strategies were taken for various medical alliances. Advantages of traditional Chinese medicine were given full play in community health management and elderly care services, alliance of traditional Chinese medicine specialists was established to provide residents with continuous medical and health services. An appropriate medical insurance payment system was established to promote the implementation of the hierarchical diagnosis and treatment system. However, there were still such problems as unbalanced distribution of medical resources, insufficient leverage role played by medical insurances, and rooms of improvement in the ability of primary medical services.