坚持项目管理的方法和策略可以有效地降低风险，降低成本，提高成功率，这些都是必不可少的元素，在波特的五种力量模型。
Adhering to project management methods and strategies can effectively reduce risks, cut costs and improve success rates, and all these areessential elements in the Porter's five force model.
因此，我们首先需要一个成熟的行动方案以降低风险和增加成功率。
Therefore, we need a mature plan of action first for reduce the risk and increase the successful rate.
目的探讨不同类型的黄斑前膜手术的成功率和手术损伤视力的风险。
Objective To evaluate the success rate and the risk of impairing vision for epimacular surgery.
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