一、取样频率： 2.5times/sec是什么意思
SEC是 一种处理器的模块 大概意思是 每秒2.5的速度
二、++++++++++核酸检测受罪吗?5岁的孩子。
新冠核酸检测不受罪。就是用咽拭子（样子与日常用的医用棉签很像）在咽后壁上下左右擦拭3-5次。
附：新型冠状病毒感染核酸检测以“咽拭子”采样过程
1、咽拭子自采样操作
（1）填写采样申请单，并阅读相关注意事项。
（2）打开无菌拭子套装，核对物品是否齐全、完整无损，采样管上条码是否为完整且信息无误（有些采样管需要自己贴上条码）。
（3）清洗双手，最好用75%的酒精擦拭双手。
（4）取出套装中的采样拭子（无菌长棉签）。
（5）面对镜子，头部微仰，嘴张大发出“啊”的长声音，使得腭垂上提暴露出咽后壁。
（6）用无菌长棉签的前端，在咽后壁上下左右擦拭3-5次。
（7）擦拭之后，打开采样管，将拭子前端垂直插入采样管内的液体中，折断采样拭子外露管外部分，拧紧管帽，在采样管上标记姓名等信息，将采样管放入密封袋中完成取样。
注意事项
（1）避免在进食后2小时内采集咽拭子，以免引起呕吐。
（2）采样前30分钟请勿吸烟、勿喝酒、勿嚼口香糖等。
（3）尽量在单独的密闭空间采样，采样后开窗通风。
（4）采集咽部样本，不要采集口腔样本。
（5）任何时候都不要用手或其他物品触及拭子采样冠（棉签前端）。
（6）折断外露管部分时动作要轻柔。
（7）采集后要洗手，并用酒精擦拭桌面和物品表面。
（8）标本要放在放有冰块的运输箱中，及时送检。
2、咽拭子工作人员采样操作
应遵循“一人一诊室一消毒”原则，检查室空间独立，保持良好的通风，每完成一位受检者的采样，应对检查室及物品进行消毒。
（1）准备工作
采集人员准备：应满足二级防护要求，工作服+隔离衣、帽子、N95口罩、护目镜、外科手套、鞋套。
物品准备：咽拭子采样套装，压舌板，检验单及条码，运输袋或冷箱，75%酒精，笔。
（2）核对受检者信息，评估受检者的病情，有无发热及咳嗽等呼吸道感染症状，流行病学史，治疗情况，心理状态等。向受检者解释注意事项，在采集的过程中可能会出现恶心、呕吐，请受检者用卫生纸捂住口鼻进行咳嗽，以免传播给他人。
（3）打开咽拭子采集套装，取出采样管并粘贴检验条码，用75%酒精擦拭双手，并待其自然晾干，戴好外科手套。
（4）准备压舌板和咽拭子，让受检者头部微仰，嘴张大，连续发“啊”音，一手用压舌板轻压舌面，一手用拭子前端在受检者上颚弓和咽后壁，快速而轻柔的刮取3-5次。
（5）将拭子前端垂直插入试管采样液中，折断拭子手捏尾部部分，迅速旋紧瓶盖，在试管上记录采集样本时间。为提高病毒载量，可取两份咽拭子放入同一采样管中，并将采集管和检验单放入独立的密封袋中。所有的样本应放进密封容器中，由专人运送至检验科。
最后按照“7步”洗手法进行手部清洁，并对检查室及所有接触物品进行消毒。
注意事项
（1）新型冠状病毒检测咽拭子检测样本应尽快送检，能在24小时内检测的样本可置于4℃保存；24小时内无法检测的样本应置于-70℃或以下保存。
（2）植绒拭子有助于新冠病毒的收集以及释放，优于传统的纤维拭子，建议使用植绒拭子进行采集，提升新冠病毒核酸检测的阳性率。
（3）折断外露管部分时动作要轻柔。
（4）采集后要洗手，并用含氯消毒液擦拭桌面和物品表面。
来源：综合自解放军疾控中心、央视网
三、见证取样中如何控制取样部位和取样数量
《混凝土结构工程施工质量验收规范》GB50204--2002 中已明确，地方质量安全监督站也有相关规定。如：水泥，进场数量，使用部位，取样代表数量，有分散装和袋装。钢筋，使用部位，取样代表数量，规格，级别都应分清楚。焊接接头等等，很多很多，仔细研究规范就明白了。
四、关于DNA fingerprinting( DNA 指纹鉴定)
DNA Fingerprinting
DNA is the genetic material found within the cell nuclei of all living things. In mammals the strands of DNA are grouped into structures called chromosomes. With the exception of identical siblings (as in identical twins), the complete DNA of each individual is unique.
DNA fingerprinting is sometimes called DNA typing. It is a method of identification that compares bits of DNA. A DNA fingerprint is constructed by first drawing out a DNA sample from body tissue or fluid such as hair, blood, or saliva. The sample is then segmented using
enzymes, and the segments are arranged by size. The segments are marked with probes and
exposed on X-ray film, where they form a pattern of black bars the DNA fingerprint. If the
DNA fingerprints produced from two different samples match, the two samples probably came
from the same person.
DNA fingerprinting was first developed as an identification technique in 1985. Originally used to detect the presence of genetic diseases, it soon came to be used in criminal investigations and legal affairs. The first criminal conviction based on DNA evidence in the United States occurred in 1988. In criminal investigations, DNA fingerprints derived from evidence collected at the crime scene are compared the DNA fingerprints of suspects. Generally, courts have accepted the reliability of DNA testing and admitted DNA test results into evidence. However, DNA fingerprinting is controversial in a number of areas: the accuracy of the results, the cost of testing, and the possible misuse of the technique.
The accuracy of DNA fingerprinting has been challenged for several reasons. First, because DNA segments rather than complete DNA strands are fingerprinted; a DNA fingerprint may not be unique; large-scale research to confirm the uniqueness of DNA fingerprinting test results has not been conducted. In addition, DNA fingerprinting is often done in private laboratories that may not follow uniform testing standards and quality controls. Also, since human beings must interpret the test, human error could lead to false results.
DNA fingerprinting is expensive. Suspects who are unable to provide their own DNA to
experts may not be able to successfully defend themselves against charges based on DNA evidence
Widespread use of DNA testing for identification purposes may lead to the establishment of a DNA fingerprint database.