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男，6岁。水肿、尿色红2天入院，半月前患过扁桃体炎。查体：颜面眼睑水肿，心肺听诊无异常，尿常规有红细胞（+++），蛋白（+）。发生上述情况，首先应采取的措施是（）
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导致化脓性感染的致病菌中，“产生溶血素和多种酶，能溶解细胞间质的透明质酸、纤维蛋白和其他蛋白质，破坏纤维所形成的脓肿壁，使感染容易扩散而缺乏局限化的倾向”属于（）
戒烟综合征兼见胸闷、气促、痰多，可在基础方的基础上加（）.
下列属于水的特性的是（）
Logistics System A logistics system consists of different functions and activities,such as the following: 1.Customer service is a core function in the logistics process.Each business entity should have a customer service department to handle complaints,special orders,loss and damage claims,returns,bills problem,and etc．This function becomes crucial because any dissatisfaction can lead to failure to retain customers. 2.Inventory management is to maintain the stock of raw materials and half-finished products.In order to satisfy the customers＇demand and minimize costs,a company should establish an optimal level of inventory to meet the market demand that exceeds our expecta-tions,and at the same time,minimize your inventory holding costs and inventory write-down costs. 3.Transportation has taken a great role in many logistics systems for two reasons.First of all,globalization and importing-exporting activities make most products necessary to be transferred from one country to another.Secondly,information revolution has propelled the manufacturing process and consumer behaviors to be changed drastically.Traditional trans-portation methods need to be upgraded to accommodate modern transportation demand,therefore,containerization and usage of information sharing system emerge. 4.Storage is needed to manage the materials and store ready-for-market products in warehouses.There is new technology applied in the storage,for example,automatic ware-house.Old-fashioned warehouse has become the distribution center where container trucks deliver and pick up the goods. 5.Information system links all logistics processes and integrates all information to en-sure all the handling of large quantity of goods are delivered in an efficient,cost-effective and accurate manner. Questions:What is the optimal level of inventory？（）
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