看打针　看出来的发明成都市二十四中初九七级科创七班魏华翔（１３岁）小时候．我经常生病，打针便成了“家常便伍”．每次去医院打针，都会看见护士先用注射器抽取注射用水，再注入药瓶内使药粉溶解成注射液，这样，护士的工作量异常繁重，注射针头不仅要频繁地穿刺注射... Look at the shots and see the invention of Chengdu in the 24th, 97th, and 7th class Wei Huaxiang (13 years old). I often get sick, and injections have become “homelike.” Every time I go to the hospital for an injection, I can see that the nurse first uses the syringe to take the water for injection and then inject it into the vial to dissolve the powder into the injection. This way, the workload of the nurse is extremely heavy, and the injection needle must not only be injected frequently...