人们通常服用含有数百颗细小颗粒的胶丸，以治疗普通的感冒症状，如咳嗽、可喷嚏、流鼻涕管。现在，人们已经可以想像，在不久的将来，也可以咽下大小差不多，内含各种微型传感器的胶丸，在体内对疾病进行探测、诊断和治疗。 美国国家航空和宇航局（ＮＡＳＡ）和美国国家癌症研 People usually take capsules containing hundreds of tiny particles to treat common cold symptoms such as coughing, sneezing, and runny nose. Now, people can already imagine that in the near future, you can swallow almost the same size, containing a variety of micro-sensor capsules in the body to detect, diagnose and treat the disease. National Aeronautics and Astronautics Agency (NASA) and National Cancer Research Institute