Our payments UAT plan has 300 test cases. We've executed 270 and 240 passed. Open defects: 2 critical, 6 high, 15 medium. Exit criteria are 100% execution, a 95% pass rate, and zero open critical or high defects. Go-live is in 3 days. How do you decide whether we can go?

支付系统 UAT 计划跑 300 个测试用例，现在执行了 270 个，通过 240 个；还没关的缺陷有 2 个 Critical、6 个 High、15 个 Medium。退出标准是全部执行、通过率 95%、Critical 和 High 都清零。离上线还有 3 天，你怎么判断能不能上？