目的 通过对青岛国际邮轮母港流行性感冒和诺如病毒胃肠炎疫情开展风险评估,为制定有效的传染病疫情控制措施提供科学依据.方法 采......

In order to offer a range of tourism products and services,it is necessary to identify and build the profile of the tour......