全文获取类型
收费全文 | 10238篇 |
免费 | 1118篇 |
国内免费 | 138篇 |
专业分类
耳鼻咽喉 | 70篇 |
儿科学 | 237篇 |
妇产科学 | 175篇 |
基础医学 | 542篇 |
口腔科学 | 547篇 |
临床医学 | 1586篇 |
内科学 | 1330篇 |
皮肤病学 | 154篇 |
神经病学 | 462篇 |
特种医学 | 171篇 |
外科学 | 609篇 |
综合类 | 1182篇 |
现状与发展 | 1篇 |
一般理论 | 1篇 |
预防医学 | 2924篇 |
眼科学 | 199篇 |
药学 | 702篇 |
23篇 | |
中国医学 | 344篇 |
肿瘤学 | 235篇 |
出版年
2024年 | 19篇 |
2023年 | 183篇 |
2022年 | 188篇 |
2021年 | 465篇 |
2020年 | 460篇 |
2019年 | 406篇 |
2018年 | 384篇 |
2017年 | 404篇 |
2016年 | 361篇 |
2015年 | 377篇 |
2014年 | 733篇 |
2013年 | 934篇 |
2012年 | 687篇 |
2011年 | 712篇 |
2010年 | 571篇 |
2009年 | 545篇 |
2008年 | 563篇 |
2007年 | 550篇 |
2006年 | 474篇 |
2005年 | 381篇 |
2004年 | 273篇 |
2003年 | 241篇 |
2002年 | 202篇 |
2001年 | 179篇 |
2000年 | 131篇 |
1999年 | 97篇 |
1998年 | 120篇 |
1997年 | 129篇 |
1996年 | 97篇 |
1995年 | 68篇 |
1994年 | 88篇 |
1993年 | 76篇 |
1992年 | 61篇 |
1991年 | 53篇 |
1990年 | 37篇 |
1989年 | 33篇 |
1988年 | 41篇 |
1987年 | 27篇 |
1986年 | 21篇 |
1985年 | 28篇 |
1984年 | 9篇 |
1983年 | 9篇 |
1982年 | 16篇 |
1981年 | 14篇 |
1980年 | 8篇 |
1979年 | 12篇 |
1978年 | 11篇 |
1977年 | 6篇 |
1976年 | 4篇 |
1968年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
32.
舰艇部队军事训练伤分布特点与干预效果研究 总被引:1,自引:0,他引:1
目的:查明海军舰艇部队特殊军事训练伤的发生率和分布特征,以及施加干预措施后军事训练伤发生率的变化。方法:以整群抽样方式选取海军某舰艇部队官兵1648人,对全年军事训练伤进行前瞻性流行病学调查;以每个参试支队各抽2艘舰艇为干预试验单位,设同期对照组和历史对照组。结果:全年军事训练伤累积发生率为14.62%,时间分布以7月份为高峰;46.53%的伤者为机电部门人员;损伤部位以下肢为主,占32.64%;受伤类型以急性创伤性损伤为主;干预试验的军事训练伤发生率为8.96%,低于同期对照组(12.21%,P<0、05)和历史对照组(14.62%,P<0.01)。结论:舰艇部队军事训练伤发生情况与其它军兵种有较大的区别。施加干预措施可显著降低舰艇部队的军事训练伤。 相似文献
33.
目的:掌握中国维和部队士兵性观念和性心理状况,力图加以正确引导和心理干预。方法:在维和任务中期,采用自编问卷,对314名中国驻利比里亚维和士兵进行性观念和性心理方面的调查。结果:超过90%的士兵性知识来源于自学,部分士兵性知识相对缺乏,通过集训的学习,仍有77%的战士对“艾滋病”有恐惧感。与未婚士兵相比,已婚士兵显示出更成熟的性心理(P<0.05);而性观念上差异没有显著性(P>0.05)。结论:针对不同群体进行有效的心理干预和心理疏导,能让士兵理智地对待自己的性欲和愿望,把性能量升华为内在的工作动力,创造性地开展维和工作。 相似文献
34.
复旦大学大学生吸烟情况及影响因素调查 总被引:11,自引:0,他引:11
目的 了解复旦大学大学生吸烟现状,分析该人群吸烟行为的影响因素,寻找有效的控烟策略以预防和矫正大学生的吸烟行为。方法 对4019名在校本科生进行了问卷调查。结果 吸烟率为2.3%,现在吸烟率为2.3%。性别、年级、专业与现在是否吸烟有关。男性是吸烟的危险因素;随着年级的升高,吸烟率呈上升趋势;非医学专业的吸烟率高于医学专业。结论 大学生对吸烟的态度和信念较好,但是吸烟率仍然处于一个比较高的水平,近一半的吸烟者并没有戒烟的打算,非吸烟者拒绝被动吸烟的意识也比较薄弱。开展控烟运动已刻不容缓,成为当务之急。 相似文献
35.
Fifty-five students and staff at Robert Gordon's Institute of Technology completed a food frequency questionnaire and then weighed their food for one week. Several methods of calculating nutrient intakes from the questionnaire are compared to results from the weighed inventory. Intakes of energy and several nutrients calculated using estimated typical portion weights were less than those derived from the weighed inventory. Food groups contributing to the apparent under-estimation have been identified. A further method of calculation involved derivation of a factor for each food group such that the frequency estimated from the questionnaire multiplied by the factor equalled the average weight of the foods in that group that had been eaten. Using these factors instead of the typical portion weights resulted in closer agreement to the weighed inventory method, but the difference ranged from positive for some groups to negative for others. Use of separate factors for each group of subjects reduced the range of differences to the weighed inventory method. 相似文献
36.
T.-N. Wu Chen-Yang Shen Saou-Hsing Liou Guang-Yang Yang K.-N. Ko Show-Lin Chao Chao-Chun Hsu P.-Y. Chang 《International archives of occupational and environmental health》1997,69(6):386-391
To monitor the lead hazards in industries and to investigate the prevalence of elevated blood lead levels (BLLs) in lead-exposed
workers, a lead surveillance system (PRESS-BLLs) has been established and operated in Taiwan, Republic of China, since July
1993. A cohort of lead-exposed workers who received a periodic annual health examination at 55 accredited hospital laboratories
was constructed. A total of 9807 separate BLL measurements were reported to the system in 1994. The mean BLL was 15.8 μg/dl
in male workers and 11.6 μg/dl in female workers. The mean BLL of lead-exposed workers was significantly (P<0.05, z-test) higher than that of the general Taiwanese population (8.6 μg/dl for males and 6.7 μg/dl for females). In addition,
the BLLs of 983 (10.0%) workers exceeded the regulatory action level (40 μg/dl for males; 30 μg/dl for females). The workplaces
and homes of 57% of the workers with elevated BLLs were thoroughly investigated to determine the sources of lead contamination.
These actions identified the causes of elevated BLLs and set up strategies to reduce workers’ lead exposure. The establishment
of this occupational lead surveillance system represents a method for monitoring of lead hazards from occupational and environmental
settings to prevent lead poisoning. The information acquired from the system can help in the setting up of a priority of prevention
and the development of control measures. It is also useful for further monitoring of changes in the BLLs of the lead-exposed-worker
cohort. The Health Department of Taiwan can use this information to evaluate the effectiveness of current industrial hygiene
practice. Subjects with elevated BLLs have been medically treated and placed on long-term follow-up for sequelae.
Received: 2 September 1996/Accepted: 29 November 1996 相似文献
37.
Background : Wounds are a common problem, particularly in the elderly population. The scale of wound problems in hospital is largely unknown because wounds are widely dispersed. The present study examined the point prevalence of hospital wounds and undertook a pressure ulcer risk assessment of all patients on one day. Methods : All 360 inpatients were surveyed and thoroughly examined. A risk scale for pressure sore development, the Norton score, was applied. When wounds were found, information was collected to determine their aetiology. Results : Forty leg ulcers, 40 pressure sores, 85 surgical wounds and seven other types of wounds were found. Most leg ulcer and pressure sore cases were admitted for other reasons. The Norton score did not predict all cases of pressure ulceration. A total of 52% of wounds did not qualify for additional funding under current funding criteria. Conclusion : The prevalence of non-surgical wounds in Heidelberg Repatriation Hospital was easily underestimated. Wound care management can be optimized by staff education and protocol design, early identification of troublesome wounds and of at-risk patients, and a cross-sectional approach that incorporates wound-management teams. 相似文献
38.
我国较贫困地区农村学龄前儿童膳食状况 总被引:5,自引:0,他引:5
对1985~1989年7省较贫困的18个乡农村儿童膳食调查资料采用平均摄入量、临界值及概率法进行了总结分析。结果表明,6~24月龄母乳喂养儿的辅食品种单一,数量不足。断奶儿童各年龄组热能、蛋白质摄入量的平均值分别达RDA的92%~104%和76%~84%,但以RDA为界值,仍有53%~62%及74%~85%的儿童热能、蛋白质摄入量低,用概率法分析蛋白质、钙、维生素A、B2、C及铁摄入不足的人数比例分别是50%~60%、93%~97%、51%~87%、74%~86%、58%~66%和12%~47%。热能、蛋白质摄入量低于RDA值儿童的身高、体重明显低于摄入量高于RDA值的儿童。 相似文献
39.
人群归因危险度百分比 (populationattributableriskproportion ,PARP)是总体人群中某种疾病归因于某种因素的暴露所引起的发病 (死亡 )占全部发病 (死亡 )的百分比 ,反映该因素所引起的发病 (死亡 )占全部发病 (死亡 )的比重。通过PARP可了解各危险因素对人群中某疾病的发病所产生的影响 ,亦即消除某危险因素后 ,所产生的对预防该疾病的效果将占有多大比重。它能够为卫生政策的制订提供依据 ,有着重要的公共卫生的实际意义。目前常用的估计PARP的方法有两种 :一种是利用全国人群抽样调查获得的人群总暴露率来估计 ;另一种是利用某地区… 相似文献
40.
目的:了解射击运动员高脂血症的发生情况和可能的引发因素,为预防高脂血症提供依据。方法:对从事专业训练半年以上,无急慢性疾病的53名省级优秀射击运动员进行膳食调查和血清脂质水平检测。结果:运动员的高脂血症检出率为28.3%,全部为高甘油三脂血症;膳食中 运动员除了摄入维生素B1、B2不足和维生素A缺乏外,其他各类营养素基本能满足机体需要,属基本合理膳食。结论:以抗阻训练和静力运动为运动特征的射击运动,可能会对机体血脂代谢产生不利的影响。 相似文献