全文获取类型
收费全文 | 37359篇 |
免费 | 2547篇 |
国内免费 | 388篇 |
专业分类
耳鼻咽喉 | 294篇 |
儿科学 | 892篇 |
妇产科学 | 641篇 |
基础医学 | 1915篇 |
口腔科学 | 1025篇 |
临床医学 | 8696篇 |
内科学 | 3494篇 |
皮肤病学 | 349篇 |
神经病学 | 2113篇 |
特种医学 | 553篇 |
外科学 | 3650篇 |
综合类 | 4718篇 |
现状与发展 | 2篇 |
一般理论 | 1篇 |
预防医学 | 7088篇 |
眼科学 | 353篇 |
药学 | 2526篇 |
37篇 | |
中国医学 | 1249篇 |
肿瘤学 | 698篇 |
出版年
2024年 | 83篇 |
2023年 | 736篇 |
2022年 | 1288篇 |
2021年 | 1737篇 |
2020年 | 1693篇 |
2019年 | 1552篇 |
2018年 | 1539篇 |
2017年 | 1289篇 |
2016年 | 1186篇 |
2015年 | 1211篇 |
2014年 | 3006篇 |
2013年 | 3002篇 |
2012年 | 2452篇 |
2011年 | 2873篇 |
2010年 | 2324篇 |
2009年 | 2060篇 |
2008年 | 1972篇 |
2007年 | 1791篇 |
2006年 | 1481篇 |
2005年 | 1137篇 |
2004年 | 846篇 |
2003年 | 748篇 |
2002年 | 564篇 |
2001年 | 508篇 |
2000年 | 389篇 |
1999年 | 350篇 |
1998年 | 328篇 |
1997年 | 287篇 |
1996年 | 257篇 |
1995年 | 177篇 |
1994年 | 180篇 |
1993年 | 147篇 |
1992年 | 143篇 |
1991年 | 117篇 |
1990年 | 98篇 |
1989年 | 81篇 |
1988年 | 94篇 |
1987年 | 76篇 |
1986年 | 64篇 |
1985年 | 81篇 |
1984年 | 44篇 |
1983年 | 38篇 |
1982年 | 47篇 |
1981年 | 45篇 |
1980年 | 35篇 |
1979年 | 29篇 |
1978年 | 30篇 |
1977年 | 14篇 |
1976年 | 13篇 |
1975年 | 12篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
Objectives: The aim was to study the characteristics of pain drawings in the neck, shoulders, and upper-back regions among the general
working population. Methods: Pain drawings of the rear view of the neck, shoulders, and upper back were made by 125 middle-aged subjects from the general
working population suffering from symptoms, mainly ache and pain, in the neck or shoulder regions. The locations of the markings
in each pain drawing were coded to computer files using a transparent grid (878 pixels). The total area, the number of separate
loci, and the left-right symmetry were recorded. Symptoms and signs were assessed at a medical examination. Results: The most frequently marked locations in the resulting aggregated topographical diagram covered two palm-sized areas in the
neck-shoulder angles, with a symmetrical and even distribution occurring between the left and right sides. Subjects with more
chronic or severe symptoms made pain drawings with larger areas. The presence of tenderness in the neck-trapezius region was
associated with larger areas and more bilateral and multiple loci. Larger areas with multiple bilateral loci and a more symmetric
distribution characterized pain drawings made by women as compared with those made by men. No substantial difference was noted
in connection with age or educational level. Conclusions: Pain drawings of neck and shoulder symptoms among the middle-aged general working population most usually focused on the
neck-shoulder angles with a symmetrical left-right distribution. The number of separate symptom loci and their total area,
left-right distribution, and symmetry were characteristics associated with symptom chronicity and severity or signs of tenderness
in the neck-trapezius region.
Received: 16 September 1998 / Accepted: 23 September 1998 相似文献
62.
史清平 《杭州医学高等专科学校学报》1999,(4)
目的:研究不同配伍的芬太尼用于开胸术后PCEA的镇痛效果。方法:75例(ASAⅠ~Ⅱ级)择期剖胸患者随机分为三组,各25例,F组单用芬太尼;FB组用芬太尼+布比卡因;FBM组用芬太尼+布比卡因+吗啡。观察用药总量,D/D比值,VAS评分,整体满意度,并发症。结果:用药总量F组显著大于FB及FBM组(P<0.05);D/D比值<2、VAS<3、整体满意度为优的病例数FB组及FBM组显著多于F组(P<0.05);恶心、皮肤瘙痒患者以FBM组最多(P<0.05,P<0.005)。结论:开胸术后患者使用IPCEA时以小剂量芬太尼合用低浓度布比卡因的给药模式为宜。 相似文献
63.
浅谈医院门诊部工作的主要特点与基本要求 总被引:5,自引:0,他引:5
翔实地阐述了门诊工作的特点:服务对象与病种的复杂性及心态的多样性;医疗质量监控缺乏系统必 ;病人就诊高峰的相对集中性;门诊诊治工作的时效性与风险性;急诊抢救工作的突发性与应性;门诊业务工作的多元性、专业性和服务保障工作的整体性;门诊部管理职能的双重性,同时提出了相应的基本要求。 相似文献
64.
M. T. Lin J. J. Wu A. Chandra B. L. Tsay 《Journal of neural transmission (Vienna, Austria : 1996)》1981,51(3-4):213-222
Summary In the rat, elevating dopamine content in corpus striatum with electrical stimulation of substantia nigra or direct administration of apomorphine (50–200g) into the lateral cerebral ventricle or apomorphine (2–10g) into the caudate-putamen complex decreased pain sensitivity (as shown by an increase in the latency to hind-paw lick in the hot plate test). Furthermore, the decreased pain sensitivity after the central administration of apomorphine was antagonized by pretreatment with haloperidol (a dopamine antagonist). On the other hand, lowering dopamine content in corpus striatum with electrolytic destruction of substantia nigra and 6-hydroxydopamine lesions to the substantia nigra, as well as direct injection of haloperidol into the lateral cerebral ventricle or caudate-putamen complex increased pain sensitivity. The data indicate that activation of striatal dopamine receptors in rat brain induces pain inhibition. 相似文献
65.
Lambo E 《The International journal of health planning and management》1991,6(2):89-108
Health For All by the Year 2000, usually referred to as HFA/2000, is a goal that has been accepted by most nations of the world. PHC is the strategy designed to achieve this laudable goal. In Nigeria, there is no doubt that remarkable strides have been made to achieve the goal of HFA/2000 in recent years. However, in order to fully realise this goal, some further revolutionary management steps are needed. This article first examines the progress on HFA made so far in Nigeria; and then, discusses some management initiatives that need to be taken or accelerated to be able to reach that desirable destination. 相似文献
66.
绝育术后盆腔痛患者血浆、腹腔液中甾体激素与前列腺素相关性研究 总被引:5,自引:1,他引:4
本文测定绝育术后盆腔痛患者44例、输卵管绝育术后行输卵管复通术11例和正常妇女15例血浆与腹腔液中的甾体激素及前列腺素水平。结果发现:血中E_2与PGF_(2α)呈明显正相关,与TXB_2呈负相关,而P则与PGF_(2α)呈明显负相关;腹腔液中E_2与PGF_(2α)、TXB_2呈负相关。盆腔痛患者,包括异位症、无明显病变盆腔痛和盆腔静脉瘀血症3组的某种PG水平高于其他组。结果表明:血与腹腔液中PGs受甾体激素的影响,绝育术后慢性盆腔痛与PGs有关。 相似文献
67.
C. Vial X. Martin N. Lefrancois J. M. Dubernard F. Chauvin B. Bady 《Diabetologia》1991,34(Z1):S100-S102
To asses the long-term evolution of diabetic polyneuropathy after a combined kidney-pancreas transplant, an electrophysiological study was performed in 20 diabetic patients before transplant, and 1 (n=18), 2 (n=16), 3 (n=10) and 4 years (n=5) at a later date. Motor and sensory scores were calculated for conduction velocity and amplitude to determine the physiopathological process. During evolution the scores were not found to be decreasing. Motor and sensory velocity scores were significantly improved (p<0.05) 1=" and=" 2=" years=" after=" the=" graft,=" when=" score=" values=" tended=" to=" stabilize.=" motor=" and=" sensory=" amplitude=" scores,=" which=" are=" more=" sensitive=" for=" axonal=" loss=" assessment=" were=" slightly=" but=" not=" significantly=">0.05)> 相似文献
68.
Relative risk factors for osteoporotic fracture: A pilot study of the MEDOS questionnaire 总被引:3,自引:0,他引:3
Summary This study tested selected elements of a questionnaire devised to detect risk factors for osteoporosis in a large case-control study of hip fracture. The questions were applied to two separate studies. The first utilised a hospital sample of postmenopausal women with established vertebral osteoporosis, and responses were compared to woman with primary osteoarthritis. In a second study, the questionnaire was applied to apparently healthy women participating in a study of bone density. Significant differences between patients with osteoporosis and osteoarthritis were observed in body mass index, the prevalence of appendicular fractures, the degree of immobilisation, the age of menarche, exposure to sunlight and indices of physical activity. Significant differences were found in bone mass in healthy women divided according to the age of menarche, parity and duration of lactation. These data identify previously established risk factors for osteoporosis and suggest that the MEDOS questionnaire will provide a powerful tool for the future assessment of risk factors in osteoporosis.
Collaborating centers: Dilen G., Istanbul; Gennari C., Siena; Lopez Vaz A.A., Porto; Lyritis G., Athens; Mazzuoli G.D., Rome; Miravet L., Paris; Passeri M., Parma; Perez Cano R., Sevilla; Rapado A., Madrid; Ribot C., Toulouse.
Project group: Allander E., WHO Collaborating Centre for the Epidemiology of Rheumatic Conditions, Huddinge; Dequeker J., WHO Consultant, Leuven; Gonzalez A., Sandoz, Basle; Kanis J.A., European Osteoporosis Foundation, Sheffield; Keen D., Sandoz, Basle; Khaltaev N., WHO Non-communicable Diseases, Geneva; Plüss M., Sandoz, Basle. 相似文献
69.
Preoperative anxiety and postoperative pain in women undergoing hysterectomy. A repeated-measures design 总被引:9,自引:0,他引:9
Kain ZN Sevarino F Alexander GM Pincus S Mayes LC 《Journal of psychosomatic research》2000,49(6):417-422
OBJECTIVES: To determine whether psychological variables such as preoperative anxiety can serve as predictors for the postoperative pain response. METHODS: The study sample included women who underwent elective abdominal hysterectomy (n=53). Two weeks prior to surgery, characteristics such as trait anxiety, coping style, and perceived stress were evaluated. Throughout the perioperative period, state anxiety, pain, as well as analgesic consumption were assessed at multiple time points. The anesthetic and surgical management were carefully controlled for and postoperative pain management was standardized. RESULTS: Path analysis demonstrated that there are both direct and indirect effects of preoperative state anxiety on postoperative pain. Preoperative state anxiety is a significant positive predictor of the immediate postoperative pain (beta=0.30), which, in turn, is a positive predictor of pain on the wards (beta=0.54). Pain on the ward, in turn, is predictive for pain at home (beta=0.30). CONCLUSION: The results of this study indicate that preoperative anxiety may have a critical role in the chain-of-events that controls the postoperative pain response. 相似文献
70.
Mino Y Shigemi J Otsu T Tsuda T Babazono A 《Psychiatry and clinical neurosciences》2000,54(2):169-172
There is a possibility that cessation of smoking improves mental health, but there are no studies that have demonstrated this. A cohort study was performed for 1 year in 18 males who spontaneously stopped smoking (cessation group) and 173 who continued to smoke (smoking group). The mental health state was evaluated using the Japanese version of the 30-item General Health Questionnaire (GHQ-30) before the cessation of smoking and 6 months and 1 year after smoking cessation. Changes in the GHQ score were compared between the cessation and smoking groups. In order to control the effects of confounding factors, multiple regression analyses were performed using the GHQ score after 6 months and 1 year as dependent variables. The GHQ score in the cessation group significantly decreased 6 months and 1 year after smoking cessation (P < 0.04 and 0.01, respectively, by paired t-test). In the smoking group, the GHQ score slightly decreased. Repeated measure analysis of variance revealed that the decrease in the GHQ score in the cessation group was significantly larger than in the smoking group. Multiple regression analysis revealed significant effects of smoking cessation on mental health after controlling for other confounding factors. It can be concluded that smoking cessation may improve mental health. 相似文献