全文获取类型
收费全文 | 19792篇 |
免费 | 1783篇 |
国内免费 | 416篇 |
专业分类
耳鼻咽喉 | 132篇 |
儿科学 | 391篇 |
妇产科学 | 2023篇 |
基础医学 | 1422篇 |
口腔科学 | 101篇 |
临床医学 | 2804篇 |
内科学 | 1868篇 |
皮肤病学 | 180篇 |
神经病学 | 818篇 |
特种医学 | 504篇 |
外国民族医学 | 1篇 |
外科学 | 5092篇 |
综合类 | 2858篇 |
现状与发展 | 1篇 |
一般理论 | 4篇 |
预防医学 | 1117篇 |
眼科学 | 103篇 |
药学 | 1141篇 |
34篇 | |
中国医学 | 893篇 |
肿瘤学 | 504篇 |
出版年
2024年 | 33篇 |
2023年 | 380篇 |
2022年 | 493篇 |
2021年 | 907篇 |
2020年 | 950篇 |
2019年 | 875篇 |
2018年 | 752篇 |
2017年 | 878篇 |
2016年 | 783篇 |
2015年 | 769篇 |
2014年 | 1327篇 |
2013年 | 1498篇 |
2012年 | 1042篇 |
2011年 | 1194篇 |
2010年 | 989篇 |
2009年 | 996篇 |
2008年 | 926篇 |
2007年 | 994篇 |
2006年 | 865篇 |
2005年 | 715篇 |
2004年 | 654篇 |
2003年 | 550篇 |
2002年 | 406篇 |
2001年 | 364篇 |
2000年 | 289篇 |
1999年 | 282篇 |
1998年 | 243篇 |
1997年 | 206篇 |
1996年 | 202篇 |
1995年 | 163篇 |
1994年 | 139篇 |
1993年 | 106篇 |
1992年 | 99篇 |
1991年 | 107篇 |
1990年 | 75篇 |
1989年 | 73篇 |
1988年 | 72篇 |
1987年 | 71篇 |
1986年 | 67篇 |
1985年 | 115篇 |
1984年 | 67篇 |
1983年 | 47篇 |
1982年 | 49篇 |
1981年 | 32篇 |
1980年 | 36篇 |
1979年 | 26篇 |
1978年 | 35篇 |
1977年 | 15篇 |
1976年 | 17篇 |
1975年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
目的:探讨舌下含服米索前列醇预防剖宫产产后出血的效果。方法:将妊娠晚期单胎选择性剖宫产者200例随机分为两组,研究组110例,在第二产程末胎头娩出后舌下含服米索400μg,对照组90例,在胎儿娩出后静脉注射催产素20IU,观察产后2h出血量和用米索前后血压及用药后出现的副作用,结果:产后2h内的出血量,研究组与对照组分别为174.43ml和219.73ml,二组比较有显著性差异(P<0.01),用米索前后血压比较,二组无显著性差异(P>0.05),结论:舌下含服前列醇促进子宫收缩作用强于催产素,能减少产后出血,也适用于某些与血管变化有关的高危孕产妇,预防产后出血。 相似文献
92.
刘庆红 《菏泽医学专科学校学报》2002,14(1):66-67
目的 探讨产后出血的原因与影响因素。方法 回顾分析收治的产后出血 15 9例 ,数据处理采用χ2 检验。结果 产后出血发生率 3.5 % ,产后 2小时内出血者 88.6 7% ,出血原因宫缩乏力为 6 6 .6 7% ,影响因素有手术产、流产史、分娩史、妊娠合并症及产程延长等 ,统计学处理P <0 .0 1。结论 重视产后出血的影响因素 ,正确评估出血量及产妇产后 2小时留置产房观察是产后出血早期诊断的关键 ,其预防重点在于早期发现并针对不同原因及时正确处理 相似文献
93.
The quality of medical education during internship is a cause for concern. This paper describes a structured educational programme for interns that was based around learning modules, clinical attachments and bedside teaching. The programme was incorporated into the term rotation of interns within an Area Health Service, and evaluated. Learning modules were timetabled by a Programme Coordinator and interns were reminded to attend. Clinical attachments were organized by the interns from a list of willing supervisors. Attendance at timetabled learning modules averaged 67%, which was greater than the 27% attendance at clinical attachments. Both sessions received high ratings for quality and clinical relevance. This structured education programme was based upon adult learning methods and was both feasible and well received by interns. Intern training programmes need to be programmed into the working week to ensure attendance, and modified following evaluation by interns. Such programmes should be considered by all hospitals to which interns are allocated. 相似文献
94.
Minoru Yagi Takeshi Mishina Tsukasa Fujishima Kazutoshi Date Hiroshi Saito Nobuo Suzuki 《Surgery today》1997,27(1):84-87
The acute onset of peritoneal signs and shock in a 7year-old boy who had been hit in the epigastrium by a log-seesaw mandated surgical treatment. Enhanced computed tomography (CT) demonstrated complete laceration of the pancreas as well as duodenal injury, and a duodenoduodenostomy with distal pancreaticogastrostomy was subsequently performed. Temporary external drainage of the stomach and distal pancreas led to an uneventful recovery in the early postoperative period. Although the patient's postoperative development was appropriate for his age, the orifice of the distal pancreas spontaneously closed 2.5 years following surgery. We present this report to stress the fact that every effort should be made to preserve the pancreas following abdominal injury in children. 相似文献
95.
Summary
Extracorporeal shock wave lithotripsy (ESWL) is standard therapy for urolithiasis. With comparable technical principles, various
lithotripters have been developed and are in routine use. Renal pelvic stones, calyceal stones, ureteral stones, and other
special forms can be treated with varying results. Currently, the so-called clinically insignificant residual fragments and
the recurrence of calculi are under discussion. Whereas the side effects of ESWL are well known, studies comparing ESWL with
other endourological procedures are still lacking.
相似文献
96.
97.
This paper details the indications, operative technique and results of perineal proctectomy in the management of complete rectal prolapse in a high risk, elderly and debilitated group of patients. Eighteen procedures were performed by one surgeon (A.L.P.) on 16 consecutive patients over a 5 year period. Data collection was via: (i) retrospective analysis of hospital and office records; and (ii) response to a postal questionnaire by the patient, a relative or attending nursing staff. There were 14 females and two males with a mean age of 81 years. All patients had significant associated medical conditions. The interval from the time of a surgical procedure until review varied from 3 to 37 months with a mean follow-up period of 16 months. Total hospital stay varied between 6 and 20 days with a mean of 7 days. Eleven procedures were performed under general anaesthesia and seven under spinal anaesthesia. There was no postoperative mortality. One patient suffered an anastomotic haemorrhage that required operative intervention and another patient suffered a rectal stricture that necessitated dilatation. Two patients were re-operated for recurrent symptomatic prolapse at 34 and 36 months after the initial procedure. Continence improved in seven patients, worsened in one and was unchanged in the remaining patients. Fifteen of 16 patients were considered to have had a successful result from the operation with satisfactory control of the symptom of rectal prolapse. Perineal proctectomy is a low risk operative procedure for the elderly and debilitated group of patients in controlling complete rectal prolapse. If the condition recurs, the procedure can be repeated with equally low morbidity. 相似文献
98.
目的探讨血压正常老年患者和老年高血压患者24h动态血压波动规律及与靶器官损害的关系.方法采用无创伤袖带式动态血压监测仪检测36例中年人(对照组),50例血压正常老年患者,60例老年高血压患者的动态血压.结果血压正常老年患者较中年血压正常者24h动态血压呈杓型曲线的比例明显下降.血压正常老年患者,血压昼夜波动曲线与心、脑、肾损害无相关性.老年高血压患者,血压曲线呈非杓型者比例增高,血压昼夜节律消失较节律正常的高血压患者有更显著的靶器官损害.结论对于非高血压患者,随年龄的增加,血压昼夜节律消失者增多,血压曲线变化与心、脑、肾损害无关,可能与原发病有关.对于高血压患者,血压昼夜节律紊乱可作为靶器官损害的预测因子. 相似文献
99.
孕妇情绪与产后抑郁症相关因素的研究 总被引:1,自引:0,他引:1
为了探讨孕妇抑郁、焦虑情绪、产后抑郁症的发生率,及其关系和有关影响因素,随机抽取1997年1~11月在本院分娩的部分孕妇共1052例进行情绪测定(HAD)问卷调查,其中以艾氏广后抑郁量表(EPDS)跟踪至产后7天的有866例。调查结果:EPDS阳性率为15.01%,HAD问卷中A值总分、D值总分≥11分的分别为5.13%及437%;随着A值、D值的增高,EPDS阳性率也随之升高。据此分析了影响EPDS和A值、D值的有关因素,并提出了相应措施。 相似文献
100.