首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   421271篇
  免费   28546篇
  国内免费   5531篇
耳鼻咽喉   5698篇
儿科学   8816篇
妇产科学   10525篇
基础医学   56895篇
口腔科学   12341篇
临床医学   35679篇
内科学   82991篇
皮肤病学   9046篇
神经病学   28888篇
特种医学   15516篇
外国民族医学   98篇
外科学   64182篇
综合类   20089篇
现状与发展   9篇
一般理论   65篇
预防医学   21263篇
眼科学   10633篇
药学   36235篇
  55篇
中国医学   4760篇
肿瘤学   31564篇
  2021年   3730篇
  2020年   2918篇
  2019年   3729篇
  2018年   5559篇
  2017年   4718篇
  2016年   4576篇
  2015年   5869篇
  2014年   8196篇
  2013年   10032篇
  2012年   13877篇
  2011年   14550篇
  2010年   9548篇
  2009年   8684篇
  2008年   12800篇
  2007年   13305篇
  2006年   13153篇
  2005年   11670篇
  2004年   10642篇
  2003年   10208篇
  2002年   9589篇
  2001年   29325篇
  2000年   29583篇
  1999年   24208篇
  1998年   5412篇
  1997年   4472篇
  1996年   3966篇
  1995年   3711篇
  1994年   3343篇
  1993年   2957篇
  1992年   16155篇
  1991年   14913篇
  1990年   14205篇
  1989年   13996篇
  1988年   12630篇
  1987年   12089篇
  1986年   11116篇
  1985年   10338篇
  1984年   6922篇
  1983年   5603篇
  1982年   2720篇
  1979年   5478篇
  1978年   3348篇
  1977年   2964篇
  1975年   2637篇
  1974年   3069篇
  1973年   2865篇
  1972年   2830篇
  1971年   2774篇
  1970年   2510篇
  1969年   2543篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Whether the underlying mutations are homozygous, heterozygous, or co-inherited with other hemoglobinopathies, sickle cell disease is known to afflict the kidneys, leading to the clinical entity known as sickle cell nephropathy (SCN). Although common, SCN remains diagnostically elusive. Conventional studies performed in the context of renal disorders often fail to detect early stage SCN. This makes the quest for early diagnosis and treatment more challenging, and it increases the burden of chronic kidney disease-related morbidity among patients. Novel diagnostic tools have been employed to overcome this limitation. In this study, we discuss various biomarkers of SCN, including those employed in clinical practice and others recently identified in experimental settings, such as markers of vascular injury, endothelial dysfunction, tubulo-glomerular damage, and oxidative stress. These include kidney injury molecule-1, monocyte chemoattractant protein-1, N-acetyl-B-D-glucosaminidase, ceruloplasmin, orosomucoid, nephrin, and cation channels, among others. Furthermore, we explore the potential of novel biomarkers for refining diagnostic and therapeutic approaches and describe some obstacles that still need to be overcome. We highlight the importance of a collaborative approach to standardize the use of promising new biomarkers. Finally, we outline the limitations of conventional markers of renal damage as extensions of the pathogenic process occurring at the level of the organ and its functional subunits, with a discussion of the expected pattern of clinical and biochemical progression among patients with SCN.  相似文献   
2.
目的 探讨精神科护士夜班经历创伤事件后的成长体验,以期为护士不同阶段心理情况进行针对性干预和指导,并为护士职业生涯早期心理建设提供方向。方法 采用扎根理论的研究方法,2020年3月—7月对广东省某三级甲等医院12名夜班经历创伤事件的精神科护士进行深度访谈,采用Strauss和Corbin扎根理论分析资料,分为开放式登录、轴心式登录和选择式登录3个阶段,持续比较分析资料。结果 发现精神科护士夜班经历创伤事件后经历了应激期、调适期、成长期3个不同阶段。结论 精神科护士夜班经历创伤事件后的成长为动态过程,管理者或干预者可根据不同阶段进行针对性干预和指导,并在护士早期培训中促使其提前做好相关知识、技能的储备和必备心理素质的塑造。  相似文献   
3.
肝细胞癌(HCC)是最常见的恶性肿瘤之一。尽管在早期诊断和个体化治疗方面取得了进展,但经根治性切除等治疗后,HCC患者的临床预后仍不佳,复发率高。因此,在HCC患者中识别准确可靠的预后标志物是必要的。作为一种新的免疫营养生物标志物,控制营养状态(CONUT)评分已被报道用于预测癌症患者的预后。本文将对术前CONUT评分与HCC肝切除术后预后的研究进展进行综述。  相似文献   
4.
5.
AIM: To investigate whether non-canonical autophagy transport receptor cell cycle progression 1 (CCPG1) is involved in the corneal antifungal immune response. METHODS: Human corneal epithelial cells (HCECs) and human myeloid leukemia mononuclear cells (THP-1) macrophages stimulated by Aspergillus fumigatus (A. fumigatus) were used as cell models. The expression of CCPG1 mRNA was detected by qRT-PCR. Western blot was used to determine the protein expression of CCPG1 and interleukin-1β (IL-1β). The dectin-1 neutralizing antibody was used to detect the association between dectin-1 and CCPG1. Immunofluorescence was used to observe the colocalization of CCPG1 and C-type lectin-like receptor-1 (CLEC-1) in THP-1 macrophages. RESULTS: The expression of CCPG1 started to increase at 4h after infection and increased in a time-dependent manner in HCECs and THP-1 macrophages. With dectin-1 neutralizing antibody pretreatment, the expression of IL-1β was down-regulated. CCPG1 up-regulation in response to A. fumigatus infection was independent of dectin-1. Immunofluorescence showed the colocalization of CCPG1 and CLEC-1 in THP-1 macrophages. CONCLUSION: As a specific autophagy protein of non-canonical autophagy pathway, CCPG1 is involved in corneal infection with A. fumigatus.  相似文献   
6.
The use of radiation for primary liver cancers has historically been limited because of the risk of radiation-induced liver disease. Treatment fields have become more conformal because of several technical advances, and this has allowed for dose escalation. Stereotactic body radiation therapy (SBRT), also known as stereotactic ablative radiotherapy, is now able to safely treat liver tumors to ablative doses while sparing functional liver parenchyma by using highly conformal therapy. Several retrospective and small prospective studies have examined the use of SBRT for liver cancers; however, there is a lack of well-powered randomized studies to definitively guide management in these settings. Recent advances in systemic therapy for primary liver cancers have improved outcomes; however, the optimal selection criteria for SBRT as a local therapy remain unclear among other liver-directed options such as radiofrequency ablation, transarterial chemoembolization, and radioembolization.  相似文献   
7.
白庚亮  华东  杨勇 《中国药事》2022,36(5):586-592
目的: 探究药事法规课程思政建设的思路与实施路径,为高等学校药学相关专业本科药事法规课程思政建设提供参考方法: 基于《高等学校课程思政建设指导纲要》的文件要求,汇总分析药事法规课程思政建设要点与思政元素,结合课堂内外资源,提出课程思政建设多维价值框架,并应用于药事法规课程思政教学中。结果与结论: 在课程思政教学中,可遵循“三结合,两巩固,一推动”的多维价值框架,将社会主义核心价值观、职业使命感、民族自豪感、中医药文化自信、家国情怀等思政元素融入其中。专业课程需起到良好的思政教学作用,但应注意坚持以学生为中心,做到“润物细无声”,有效把握不同课程思政元素的应用,并重视任课教师的言传身教,还需要对课程思政建设效果进行评价与反思,以使课程建设不断完善。  相似文献   
8.
Peng  L. Q.  Wu  X. X.  Chen  G.  Cai  H. Z.  Tang  Y. P.  Chen  Q. Y.  Chen  X. Y. 《Bulletin of experimental biology and medicine》2022,173(3):335-340
Bulletin of Experimental Biology and Medicine - This study aimed to explore the effects of Wenyang Zhenshuai granules (WZG) on the morphology of cardiomyocytes, cell viability, and the expression...  相似文献   
9.
10.
Post-induction hypotension is common and associated with postoperative complications. We hypothesised that pneumatic leg compression reduces post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy. In this double-blind randomised study, patients were allocated randomly to the pneumatic leg compression group (n = 50) or control (n = 50). In the intervention group, pneumatic leg compression was initiated before induction of anaesthesia. In the control group, pneumatic leg compression was initiated 20 min after anaesthesia induction. The primary outcome was the incidence of post-induction hypotension in these groups. Post-induction hypotension was defined as systolic blood pressure < 90 mmHg during the first 20 min after induction. Haemodynamic variables and area under the curve of post-induction systolic blood pressure over time were assessed. Complications associated with pneumatic leg compression were recorded, including: peripheral neuropathy; compartment syndrome; extensive bullae beneath the leg sleeves; and pulmonary thromboembolism. The incidence of post-induction hypotension decreased in the pneumatic leg compression group compared with that in the control group; 5 (10%) vs. 29 (58%), respectively, p < 0.001. In the pneumatic leg compression group, the lowest systolic, diastolic and mean blood pressures 20 min after induction of anaesthesia were significantly greater than the control group. Pneumatic leg compression resulted in an increased area under the curve of systolic blood pressure in the first 20 min after induction, p = 0.001. There were no pneumatic leg compression-related complications. Pneumatic leg compression reduced post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy, suggesting that it is an effective and safe intervention to prevent post-induction hypotension among elderly patients undergoing general anaesthesia.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号