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对１８７例不同肿瘤患者血清硒进行了测定，同时观察了部分病例口服补硒后血清硒水平的变化。结果表明：肿瘤病人机体处于低硒状态，给予补硒后，不能使低硒状态得到改善。
Serum selenium was measured in 187 patients with different tumors. Changes in serum selenium levels were also observed in some cases after oral selenium supplementation. The results showed that the body of the cancer patient was in a state of low selenium, and after adding selenium, the state of low selenium could not be improved.