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   31333篇
  免费   2181篇
  国内免费   839篇
耳鼻咽喉   406篇
儿科学   494篇
妇产科学   496篇
基础医学   4017篇
口腔科学   646篇
临床医学   2636篇
内科学   6512篇
皮肤病学   964篇
神经病学   1942篇
特种医学   1078篇
外国民族医学   4篇
外科学   4095篇
综合类   2012篇
现状与发展   3篇
一般理论   5篇
预防医学   2169篇
眼科学   724篇
药学   2685篇
  2篇
中国医学   744篇
肿瘤学   2719篇
  2024年   49篇
  2023年   336篇
  2022年   681篇
  2021年   1141篇
  2020年   646篇
  2019年   878篇
  2018年   1118篇
  2017年   820篇
  2016年   977篇
  2015年   1179篇
  2014年   1396篇
  2013年   1524篇
  2012年   2386篇
  2011年   2410篇
  2010年   1426篇
  2009年   1109篇
  2008年   1771篇
  2007年   1774篇
  2006年   1717篇
  2005年   1646篇
  2004年   1498篇
  2003年   1388篇
  2002年   1196篇
  2001年   1005篇
  2000年   934篇
  1999年   712篇
  1998年   240篇
  1997年   231篇
  1996年   174篇
  1995年   154篇
  1994年   168篇
  1993年   107篇
  1992年   244篇
  1991年   188篇
  1990年   163篇
  1989年   138篇
  1988年   119篇
  1987年   117篇
  1986年   114篇
  1985年   82篇
  1984年   43篇
  1983年   41篇
  1981年   20篇
  1980年   21篇
  1979年   26篇
  1978年   21篇
  1976年   20篇
  1973年   22篇
  1971年   22篇
  1969年   20篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
ABSTRACT

Purpose

Work-related eye injuries have been reported with a variety of epidemiologic and clinical characteristics. We aimed to identify epidemiologic characteristics of work-related eye injuries and risk factors associated with severe injury in a large metropolitan city.  相似文献   
5.
6.
Hailey–Hailey disease (HHD), also known as benign familial pemphigus, is an autosomal dominant skin condition that affects the adhesion of epidermal keratinocytes. Although the initial manifestation of flaccid vesicles on erythematous or normal skin in flexure sites frequently goes unnoticed, large, macerated, exudative plaques of superficial erosions with crusting are observed at the time of diagnosis. There is no specific treatment for HHD, and most cases are symptomatically supported. However, infrared laser ablation has been somewhat helpful. We present a case successfully treated with fractional CO2 laser showing a long-term favourable outcome and no adverse effects. Thus, this modality could be an alternative to full ablation for this condition.  相似文献   
7.
Gangliocytic paragangliomas are rare tumors that almost exclusively occur within the second portion of the duodenum. Although these tumors generally have a benign clinical course, they have the potential to recur or metastasize to regional lymph nodes. The case report presented here describes a 57-year-old female patient with melena, progressive asthenia, anemia, and a mass in the second-third portion of the duodenum that was treated by local excision. The patient was diagnosed with a friable bleeding tumor. The histologic analysis showed that the tumor was a 4 cm gangliocytic paraganglioma without a malignant cell pattern. In the absence of local invasion or distant metastasis, endoscopic resection represents a feasible, curative therapy. Although endoscopic polypectomy is currently considered the treatment of choice, it is not recommended if the size of the tumor is > 3 cm and/or there is active or recent bleeding. Patients diagnosed with a gangliocytic paraganglioma should be closely followed-up for possible local recurrence.  相似文献   
8.
目的 探讨阿戈美拉汀联合乙哌立松治疗青年慢性紧张性头痛(Chronictention-typeheadache,CTTH)的疗效及安全性.方法 80例青年慢性紧张性头痛患者依据是否倒班随机分为对照组和治疗组,对照组口服乙哌立松治疗,治疗组在对照组基础上联合阿戈美拉汀治疗,评估2组患者治疗前匹兹堡睡眠量表评分(PSQI)评估治疗6周后两组的头痛疗效以及不良反应.结果 倒班人员的入组前PSQI的总评分、睡眠质量、入睡时间、催眠药物及睡眠障碍因子分高于非倒班人员;治疗组的疗效优于对照组,有统计学意义(P<0.05);治疗组内,倒班患者疗效优于非倒班患者(P<0.05).两组不良反应无明显差异.结论 阿戈美拉汀联合乙哌立松治疗慢性紧张性头痛的的疗效确切,安全性高.  相似文献   
9.

Introduction

In the phase II/III KEYNOTE-010 study (ClinicalTrials.gov, NCT01905657), pembrolizumab significantly prolonged overall survival over docetaxel in patients with previously treated, programmed death ligand 1–expressing (tumor proportion score ≥ 1%), advanced NSCLC. Health-related quality of life (HRQoL) results are reported here.

Methods

Patients were randomized 1:1:1 to pembrolizumab 2 or 10 mg/kg every 3 weeks or docetaxel 75 mg/m2 every 3 weeks. HRQoL was assessed using European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Questionnaire (QLC) Core 30 (C30), EORTC QLQ–Lung Cancer 13 (LC13), and EuroQoL-5D. Key analyses included mean baseline-to-week-12 change in global health status (GHS)/quality of life (QoL) score, functioning and symptom domains, and time to deterioration in a QLQ-LC13 composite endpoint of cough, dyspnea, and chest pain.

Results

Patient reported outcomes compliance was high across all three instruments. Pembrolizumab was associated with better QLQ-C30 GHS/QoL scores from baseline to 12 weeks than docetaxel, regardless of pembrolizumab dose or tumor proportion score status (not significant). Compared with docetaxel, fewer pembrolizumab-treated patients had “deteriorated” status and more had “improved” status in GHS/QoL. Nominally significant improvement was reported in many EORTC symptom domains with pembrolizumab, and nominally significant worsening was reported with docetaxel. Significant prolongation in true time to deterioration for the QLQ-LC13 composite endpoint emerged for pembrolizumab 10 mg/kg compared to docetaxel (nominal two-sided p = 0.03), but not for the 2-mg/kg dose.

Conclusions

These findings suggest that HRQoL and symptoms are maintained or improved to a greater degree with pembrolizumab than with docetaxel in this NSCLC patient population.  相似文献   
10.
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