全文获取类型
收费全文 | 34341篇 |
免费 | 2539篇 |
国内免费 | 101篇 |
专业分类
耳鼻咽喉 | 384篇 |
儿科学 | 910篇 |
妇产科学 | 511篇 |
基础医学 | 4614篇 |
口腔科学 | 676篇 |
临床医学 | 3107篇 |
内科学 | 7270篇 |
皮肤病学 | 579篇 |
神经病学 | 3791篇 |
特种医学 | 1352篇 |
外国民族医学 | 5篇 |
外科学 | 5050篇 |
综合类 | 681篇 |
一般理论 | 66篇 |
预防医学 | 2965篇 |
眼科学 | 682篇 |
药学 | 2075篇 |
中国医学 | 21篇 |
肿瘤学 | 2242篇 |
出版年
2023年 | 120篇 |
2022年 | 193篇 |
2021年 | 469篇 |
2020年 | 274篇 |
2019年 | 484篇 |
2018年 | 615篇 |
2017年 | 452篇 |
2016年 | 517篇 |
2015年 | 586篇 |
2014年 | 912篇 |
2013年 | 1433篇 |
2012年 | 2148篇 |
2011年 | 2315篇 |
2010年 | 1245篇 |
2009年 | 1170篇 |
2008年 | 2179篇 |
2007年 | 2317篇 |
2006年 | 2280篇 |
2005年 | 2480篇 |
2004年 | 2204篇 |
2003年 | 2058篇 |
2002年 | 2054篇 |
2001年 | 426篇 |
2000年 | 353篇 |
1999年 | 416篇 |
1998年 | 439篇 |
1997年 | 426篇 |
1996年 | 394篇 |
1995年 | 379篇 |
1994年 | 297篇 |
1993年 | 297篇 |
1992年 | 304篇 |
1991年 | 311篇 |
1990年 | 279篇 |
1989年 | 259篇 |
1988年 | 231篇 |
1987年 | 255篇 |
1986年 | 214篇 |
1985年 | 219篇 |
1984年 | 262篇 |
1983年 | 245篇 |
1982年 | 303篇 |
1981年 | 298篇 |
1980年 | 253篇 |
1979年 | 158篇 |
1978年 | 161篇 |
1977年 | 107篇 |
1976年 | 137篇 |
1975年 | 100篇 |
1974年 | 120篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
Catecholaminergic polymorphic ventricular tachycardia is important to be diagnosed as an underlying disease in children with syncope and normal heart, because of its poor prognosis. CASE REPORT: A 3-year-old boy was referred for stress and emotion induced syncope. Primary ventricular arrhythmia, consisting of salvos of bidirectional ventricular tachycardia, was reproducibly induced by physical exertion. The syncopal events and severe arrhythmia disappeared with beta-blocking therapy. CONCLUSION: Despite its rare occurrence, catecholaminergic polymorphic ventricular tachycardia is an important cause of stress and emotion induced syncope and sudden death in children. 相似文献
4.
5.
6.
Bruce J. Horacek 《Death Studies》1991,15(5):459-472
Most theories of grieving derive from Sigmund Freud and Erich Lindemann's understanding of mourning and include two assumptions: (a) Grieving is time limited; the process should be completed or resolved after a year or two; and (b) The main task of grieving is to achieve “decathexis.” One should detach oneself from emotional ties to the deceased so as to be able to form new relationships. This study presents evidence that these assumptions are flawed and that modern theories of grieving fall short of explaining the complicated reality of the mourning process. An alternative model is presented arguing that when a “high-grief” death occurs, a griever may be able to adapt and adjust to loss, but the grieving continues indefinitely. Implications of this model for older grievers are explored. 相似文献
7.
8.
Bruce D. Cheson 《Seminars in Oncology Nursing》1991,7(4):235-242
The National Cancer Institute (NCI) is the largest single sponsor of studies using anti-neoplastic agents with over 100 compounds currently in various stages of clinical testing. Most of the clinical trials are conducted by the NCI sponsored cooperative oncology groups and community oncology programs, cancer centers, and the pharmaceutical industry. These organizations conduct studies both independently as well as in a collaborative fashion. 相似文献
9.
During much of the past century, the microbe itself stood at the heart of microbial pathogenesis. Little thought was devoted
to the host per se, though it was granted that differences in susceptibility to certain infections did exist between individuals,
and between different ethnic groups. During the past 20 years, extraordinary strides in our grasp of mammalian genetics have
made the host side of the equation far more approachable. A restricted collection of genes now presents itself as the likely
repository for genetic differences that foretell susceptibility to infectious disease. The Toll-like receptors, of which 10
are presently known to exist in humans, offer an excellent example of this genetic reductionism, in that they embody the afferent
component of the innate immune system, and strongly influence the containment of an infection from its earliest stages. The
Toll-like receptors were identified as the culmination of a long and relentless inquiry into the yet-unsolved clinical problem
of sepsis. 相似文献
10.
Single parent women 总被引:1,自引:1,他引:0
Myrna M. Weissman Philip J. Leaf Martha Livingston Bruce 《Social psychiatry and psychiatric epidemiology》1987,22(1):29-36
Summary While there has been considerable interest in the problems of single parent families, no study has yet determined if the problems are due to increased risk of specific psychiatric disorders in single parents as compared to their married counterparts. Data collected as part of the National Institute of Mental Health Epidemiologic Catchment Area (ECA) Project are presented to compare the psychiatric as well as economic and social functioning of single vs. married parent women ages 18–44, based on a probability sample of members of the greater New Haven community. The major finding between groups is their relative similarity in psychiatric as well as social functioning. The major difference is economic. Single parents, both Black and White, more frequently are less educated and poorer. While many are on welfare, single compared to married female parents are more likely to be working and to report insufficient income to meet their needs. There are no appreciable differences in social contacts, use of health services or six-month prevalence rates of psychiatric disorders including major depression, alcohol or drug abuse. The data suggest that the problems faced by single parent women and their children may be a reflection of poverty and stress in families and not of psychiatric disorders or poor social relations in mothers. 相似文献