全文获取类型
收费全文 | 605805篇 |
免费 | 71746篇 |
国内免费 | 27885篇 |
专业分类
耳鼻咽喉 | 6983篇 |
儿科学 | 10704篇 |
妇产科学 | 10563篇 |
基础医学 | 60358篇 |
口腔科学 | 13768篇 |
临床医学 | 94673篇 |
内科学 | 103130篇 |
皮肤病学 | 9243篇 |
神经病学 | 40438篇 |
特种医学 | 22283篇 |
外国民族医学 | 227篇 |
外科学 | 70845篇 |
综合类 | 72105篇 |
现状与发展 | 125篇 |
一般理论 | 131篇 |
预防医学 | 49929篇 |
眼科学 | 16421篇 |
药学 | 50643篇 |
436篇 | |
中国医学 | 24925篇 |
肿瘤学 | 47506篇 |
出版年
2024年 | 2015篇 |
2023年 | 10744篇 |
2022年 | 16645篇 |
2021年 | 23445篇 |
2020年 | 20755篇 |
2019年 | 15987篇 |
2018年 | 21520篇 |
2017年 | 20726篇 |
2016年 | 20724篇 |
2015年 | 27469篇 |
2014年 | 35090篇 |
2013年 | 36714篇 |
2012年 | 40389篇 |
2011年 | 44275篇 |
2010年 | 33327篇 |
2009年 | 31227篇 |
2008年 | 32833篇 |
2007年 | 32229篇 |
2006年 | 31865篇 |
2005年 | 29597篇 |
2004年 | 22112篇 |
2003年 | 20854篇 |
2002年 | 18354篇 |
2001年 | 12201篇 |
2000年 | 10944篇 |
1999年 | 11709篇 |
1998年 | 9094篇 |
1997年 | 8685篇 |
1996年 | 7328篇 |
1995年 | 6773篇 |
1994年 | 5426篇 |
1993年 | 3940篇 |
1992年 | 4228篇 |
1991年 | 3705篇 |
1990年 | 3206篇 |
1989年 | 2969篇 |
1988年 | 2597篇 |
1987年 | 2332篇 |
1986年 | 2057篇 |
1985年 | 1766篇 |
1984年 | 1563篇 |
1983年 | 1524篇 |
1982年 | 1499篇 |
1981年 | 1437篇 |
1980年 | 1229篇 |
1979年 | 870篇 |
1978年 | 862篇 |
1977年 | 887篇 |
1976年 | 725篇 |
1975年 | 622篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
Eija Heikkinen MNSc RN Merja Nikkonen PhD RN & Helena Aavarinne PhD RN 《Journal of advanced nursing》1998,27(5):1069-1075
The definition of envy is commonly based on psychoanalytical views of organizational culture. The purpose of this paper is to describe envy in a nursing community. The population study consisted of random sample of 120 subjects drawn from among the employees of one central hospital in Finland. The study material consisted of data collected by questionnaires (response rate 65%). The data were processed by various statistical methods. Open-ended questions were analysed by inductive content analysis. The results of this study indicated that the employee's view of his/her official position in the nursing community, his/her relationships with his/her fellow workers and the management as well as relationships with other nursing communities are all related to envy. The employee's view of his/her official position intensified his/her feelings of envy, if he/she had other negative feelings, anxiety, dissatisfaction with him/herself, and negative feelings towards fellow workers. The major object of envy was fellow workers' salaries. Envy towards other nursing communities was generated by alleged differences in the amount of labour, or by the charge nurse's greater interest in other sections. Employees coped with envy by hiding these feelings and being modest. Women coped with envy by being silent, while men denied the value of the object of envy. 相似文献
33.
本文报告113例脑前循环系统动脉管其中包括颈内动脉后交通动脉瘤75例.前交通动脉瘤17例,大脑中动脉瘤10例,人脑前动脉-胼周动脉瘤3例,颈内动脉-眼动脉瘤2例,颈内动脉海绵窦段动脉瘤1例.多发动脉瘤5例.共118个动脉瘤在显微镜下直视手术,动脉瘤直接夹闭术108例.孤立或包裹术5例:5例多发动脉瘤行同期手术3例,分期手术2例.术中发生动脉瘤破裂18次.Hunt和HessⅠ~Ⅱ级病人中有例行早期手术.全组术后死亡率为7.9%.着重讨论手术时机.术中动脉瘤破裂处理及多发动脉瘤的治疗. 相似文献
34.
35.
Psychological Consequences of Food Restriction 总被引:1,自引:0,他引:1
JANET POLIVY PhD 《Journal of the American Dietetic Association》1996,96(6):589-592
A review of the literature and research on food restriction indicates that inhibiting food intake has consequences that may not have been anticipated by those attempting such restriction. Starvation and self-imposed dieting appear to result in eating binges once food is available and in psychological manifestations such as preoccupation with food and eating, increased emotional responsiveness and dysphoria, and distractibility. Caution is thus advisable in counseling clients to restrict their eating and diet to lose weight, as the negative sequelae may outweigh the benefits of restraining one's eating. Instead, healthful, balanced eating without specific food restrictions should be recommended as a long-term strategy to avoid the perils of restrictive dieting. J Am Diet Assoc. 1996; 96:589-592. 相似文献
36.
Peter Stone MD FRNZCOG FRCOG David Cook FRNZCOG MRCOG John Hutton PhD FRNZCOG FRCOG Gordon Purdie BSc Henry Murray MD FRNZCOG MRCOG Lauren Harcourt MPP BA 《The Australian & New Zealand journal of obstetrics & gynaecology》1995,35(1):32-37
Summary: This is the first report of the largest study of blood pressure measurement in pregnancy in a New Zealand population using standardized definitions and methodology. Over 3,800 women who delivered in an 8-month period in the Wellington region were included in the study. Blood pressure measurement and the presence of oedema and proteinuria were recorded from booking until delivery and in the puerperium. Only 2.7% of women were unable to be contacted after delivery for details on outcomes. The results established normal ranges for blood pressure throughout pregnancy. The data show that Mood pressure greater than 140/90 until 35 weeks' gestation is outside 2 standard deviations at all gestations and justifies using these measurements as the definition of hypertension in pregnancy. The fall in blood pressure in the 2nd trimester was less than 1 mm Ffg per week in both the systolic and diastolic pressures. This fall was smaller than previously recorded in other studies. Gestational hypertension was the commonest blood pressure abnormality occurring in 15.2% of the population. This represented 69% of the pregnant women with a hypertensive disorder. The overall incidence of both gestational hypertension and preeclampsia was 18.5% which is higher than reported in other parts of the world. In this study obesity was significantly associated with hypertensive disorders in pregnancy. An arm circumference of >33 cm, one of the measurements of obesity, was found in 6.8% of the study population. Even after the effect of arm circumference was taken into account, hypertensive disorders were also more common in Pacific Island women. Ankle oedema was significantly associated with the development of both gestational hypertension and preeclampsia but the incidence of oedema was noted in only 11.9% of the subjects. 相似文献
37.
缺氧缺血性脑病新生鼠补钙前后脑细胞,红细胞内外钙的变化 总被引:31,自引:0,他引:31
为了观察一般剂量补钙对缺氧缺血性脑病(HIE)脑细胞和红细胞内外钙变化的影响,以探讨HIE时补钙是否增加脑细胞钙超载,用HIE新生动物模型进行了实验研究,结果表明:(1)缺氧缺血时红细胞、脑细胞及脑组织出现钙积聚;(2)补钙后,血浆总钙浓度明显升高,而脑细胞、脑组织及红细胞钙积聚并未加重;(3)血浆总钙浓度与脑细胞或红细胞胞浆游离钙离子浓度无相关关系。提示:(1)HIE时钙内流可能是全身性的;(2)对HIE并低钙血症患儿吸氧后一般剂量补钙可能是安全的。 相似文献
38.
Nursing in the health care system of the postmodern world: crossroads, paradoxes and complexity 总被引:1,自引:0,他引:1
Ada Spitzer RN PhD 《Journal of advanced nursing》1998,28(1):164-171
Entering the postmodern world in which society is confronting crossroads, paradoxes, and complexity, the health care system is encountering a transformation more comprehensive and revolutionary than has ever been seen before. Analysis of the state of nursing vis a vis these transformations indicates that the current paradigm does not ensure the existence of the profession in the postmodern health care system. That is because of increased difficulties in consolidating the economic and quality issues into the core of nursing, and in understanding the complexity inherent in health related situations. 相似文献
39.
Alexandros Karabetsos MD Dr ; George Karachalios MD Dr ; Paraskevoula Bourlinou RN Nurse ; Asimina Reppa RN Nurse ; Rozeta Koutri MD Dr ; Androniki Fotiadou MD Dr 《Headache》1997,37(1):12-14
The efficacy and safety of ketoprofen and paracetamol were compared for the treatment of acute migraine in a randomized, double-blind study of 64 patients. Thirty-four patients received ketoprofen 100 mg intramuscularly, and 30 patients received paracetamol 500 mg intramuscularly. Partial or complete relief of pain and other symptoms was achieved 15 to 20 minutes after administration in the ketoprofen group and within 35 minutes in the paracetamol group. Complete relief of pain was achieved within 30 to 40 minutes after ketoprofen in 28 patients (82.5%) compared to 5 patients (17.5%) in the paracetamol group. Six of the patients treated with ketoprofen needed a second dose for complete relief of pain during the 4-hour follow-up period. Side effects were rare and minimal. Our findings suggest that ketoprofen produced statistically significant benefit in the treatment of acute migraine. 相似文献
40.
Cheryl Wallerstedt RNC MS Patricia Higgins RN PhD 《Journal of obstetric, gynecologic, and neonatal nursing : JOGNN / NAACOG》1996,25(5):389-400
Society often expects mothers and fathers to share equally in the perinatal grief process because the child was a common bond between them. Unfortunately, in perinatal grief, this is not always the case. The mother and the father can experience incongruent grieving and use discordant coping mechanisms. It is important to evaluate these differences to facilitate communication between the distraught parents. Improved communication can in turn facilitate the grieving process. 相似文献