2023年11月14日 · Primary biliary cholangitis is an autoimmune disease in which the bile ducts are inflamed and slowly destroyed. It previously was called primary biliary cirrhosis. Bile is a fluid made in the liver. It helps with digestion and absorbing certain vitamins. It also helps the body absorb fats and get rid of cholesterol, toxins and worn-out red blood cells. Ongoing …

2022年1月6日 · A torn meniscus is one of the most common knee injuries. Any activity that causes you to forcefully twist or rotate your knee, especially when putting your full weight on it, can lead to a torn meniscus. Each of your knees has two C-shaped pieces of cartilage that act like a cushion between your shinbone and your thighbone. A torn meniscus causes pain, swelling …

2022年4月30日 · Premature ventricular contractions (PVCs) are extra heartbeats that begin in one of the heart's two lower pumping chambers (ventricles). These extra beats disrupt the regular heart rhythm, sometimes causing a sensation of a fluttering or a skipped beat in the chest. Premature ventricular contractions are a common type of irregular heartbeat (arrhythmia). …

2023年6月8日 · Overview Immune thrombocytopenia (ITP) is an illness that can lead to bruising and bleeding. Low levels of the cells that help blood clot, also known as platelets, most often cause the bleeding. Once known as idiopathic thrombocytopenic purpura, ITP can cause purple bruises. It also can cause tiny reddish-purple dots on the skin that look like a rash.

2024年3月29日 · Blood in the urine (hematuria) sometimes is a sign of bladder cancer. Learn about other bladder cancer signs and symptoms and explore treatment options.

2023年10月15日 · 1、作用不同 pcb能让不能独立运行的程序成为一个独立运行的单位。 pcba 优秀的线路设计能够达到良好的 电路性能 和散热性能。 2.本质不同 PCBA泛指一个加工流程，也可以说是成品 线路板，也就是PCB经过加工后完成。 pcb是一个空的 印刷线路板

2023年6月2日 · Overview A hepatobiliary iminodiacetic acid (HIDA) scan is an imaging procedure used to diagnose problems of the liver, gallbladder and bile ducts. For a HIDA scan, also known as cholescintigraphy or hepatobiliary scintigraphy, a radioactive tracer is injected into a vein in the arm. The tracer travels through the bloodstream to the liver, where the bile-producing cells …

原理图（Schematic）是PCB（Layout）的依据，Layout是原理图在PCB上的具体实现。 原理图是你设计的这款电路的电气连接，它是逻辑关系上的形式，它是基本的二维电路表示方式，显示了不同电气元件之间的功能和连接性。

在刚性PCB中，基板材料通常是FR-4。 但是，在Flex PCB中，常用的基材材料是聚酰亚胺（PI）膜和PET（聚酯）膜，除此之外，还可以使用聚合物膜，例如PEN（聚邻苯二甲酸乙二酯），PTFE和芳纶等。

2022年11月16日 · Gout causes intense pain and swelling around one or more joints. Gout most commonly affects the joint at the base of the big toe.