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排序方式: 共有10000条查询结果,搜索用时 8 毫秒
991.
992.
重症肺炎是呼吸系统常见疾病,表现为咳嗽、咳痰、呼吸困难等,治疗难度大,预后差,具有高病死率的特点[1-5].因免疫缺陷,不能抵御病原菌的入侵,合并重症感染的可能性更大[6-8].早期诊断重症肺炎、明确病原菌种类对患者的预后有意义.目前重症肺炎的病原菌检测的主要手段为培养法,但是受到取样、检测方式等的影响,检测准确性不高... 相似文献
993.
994.
Han-Yu Chen Xin-Yu Wang Ke-Ming Lu Chen-Hsiang Yu Mei-Tsz Su Lin Kang Keng-Fu Hsu Po-Fan Chen Sheng-Hsiang Lin 《International journal of medical sciences》2022,19(11):1672
Preeclampsia is one of the most serious pregnancy complications. It may be caused by immunological changes in the early placental microenvironment. The contents of small EVs may serve as biomarkers of pregnancy complications. Evidence suggests that the balance between T helper 17 (Th17) and regulatory T (Treg) cells are critical for preventing preeclampsia. The study recruited 39 pregnant women with preeclampsia and 127 healthy pregnant women. We assessed the levels of both Th17 and Treg cytokines (IL-10, IL-17, IL-21, IL-22, and TGF-β) in their plasma and small EVs. We found significant differences in the levels of all cytokines in the plasma between the two groups during the second trimester. We also observed significant differences between the two groups in the levels of EV-encapsulated cytokines IL-21, IL-22, and TGF-β, as well as in total small EVs, during the second trimester. The ROC analysis showed that the classification efficiency (AUC) of TGF-β in small EVs was 0.81. TGF-β had the best discriminant ability of all the single EV biomarkers tested, the cross-validation of the accuracy was 0.89. Th17 and Treg cytokines in plasma and small EVs may contribute to maternal immune activation and clarify the potential mechanisms of small EVs and cytokines in preeclampsia. 相似文献
995.
Fan Xiao Ke Rui Xiaofei Shi Haijing Wu Xiaoyan Cai Kathy O. Lui Qianjin Lu Esteban Ballestar Jie Tian Hejian Zou Liwei Lu 《Cellular & molecular immunology》2022,19(11):1215
B cells play a pivotal role in the pathogenesis of autoimmune diseases. Although previous studies have shown many genetic polymorphisms associated with B-cell activation in patients with various autoimmune disorders, progress in epigenetic research has revealed new mechanisms leading to B-cell hyperactivation. Epigenetic mechanisms, including those involving histone modifications, DNA methylation, and noncoding RNAs, regulate B-cell responses, and their dysregulation can contribute to the pathogenesis of autoimmune diseases. Patients with autoimmune diseases show epigenetic alterations that lead to the initiation and perpetuation of autoimmune inflammation. Moreover, many clinical and animal model studies have shown the promising potential of epigenetic therapies for patients. In this review, we present an up-to-date overview of epigenetic mechanisms with a focus on their roles in regulating functional B-cell subsets. Furthermore, we discuss epigenetic dysregulation in B cells and highlight its contribution to the development of autoimmune diseases. Based on clinical and preclinical evidence, we discuss novel epigenetic biomarkers and therapies for patients with autoimmune disorders. 相似文献
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997.
Lu Bai Zhenkun Zhang Lichen Ye Lin Cong Yuchen Zhao Tianlei Zhang Ziqi Shi Kai Wang 《神经科学通报》2022,38(12):1559
Recording the highly diverse and dynamic activities in large populations of neurons in behaving animals is crucial for a better understanding of how the brain works. To meet this challenge, extensive efforts have been devoted to developing functional fluorescent indicators and optical imaging techniques to optically monitor neural activity. Indeed, optical imaging potentially has extremely high throughput due to its non-invasive access to large brain regions and capability to sample neurons at high density, but the readout speed, such as the scanning speed in two-photon scanning microscopy, is often limited by various practical considerations. Among different imaging methods, light field microscopy features a highly parallelized 3D fluorescence imaging scheme and therefore promises a novel and faster strategy for functional imaging of neural activity. Here, we briefly review the working principles of various types of light field microscopes and their recent developments and applications in neuroscience studies. We also discuss strategies and considerations of optimizing light field microscopy for different experimental purposes, with illustrative examples in imaging zebrafish and mouse brains. 相似文献
998.
Qi-Lun Lai Yin-Xi Zhang Jun-Jun Wang Ye-Jia Mo Li-Ying Zhuang Lin Cheng Shi-Ting Weng Song Qiao Lu Liu 《JOURNAL OF CLINICAL NEUROLOGY》2022,18(5):499
Background and PurposeIntracranial hemorrhage (ICH) is thought to be a rare but probably underestimated presentation of cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL). We conducted a systematic review and meta-analysis with the aim of comprehensively revealing the occurrence of ICH in patients with CADASIL.MethodsEnglish-language studies published up to September 30, 2021 were searched for in the MEDLINE (PubMed), Web of Science, and Cochrane Library databases. The design, patient characteristics, occurrence rate of ICH, and associated risk factors were retrieved for each identified relevant study.ResultsWe enrolled 13 studies in the final meta-analysis, which included 1,310 patients with CADASIL. The probability of ICH occurrence in patients with CADASIL was 10.1% (95% confidence interval [CI]=5.6%–18.0%, I2=85.1%). When stratified by geographic region, the occurrence rate of ICH was much higher in Asians (17.7%; 95% CI=11.0%–28.5%, I2=76.3%) than in Europeans (2.0%; 95% CI=0.4%–10.8%, I2=82.8%). A higher burden of cerebral microbleeds (CMBs) and a history of hypertension were the most commonly recorded risk factors for ICH, which were available for three and two of the included studies, respectively.ConclusionsOur study suggests that ICH is an important clinical manifestation of CADASIL, especially in Asians. A higher burden of CMBs and the existence of hypertension were found to be associated with a higher probability of ICH occurrence in patients with CADASIL. 相似文献
999.
1000.