全文获取类型
收费全文 | 33478篇 |
免费 | 2015篇 |
国内免费 | 379篇 |
专业分类
耳鼻咽喉 | 550篇 |
儿科学 | 356篇 |
妇产科学 | 464篇 |
基础医学 | 5574篇 |
口腔科学 | 877篇 |
临床医学 | 2713篇 |
内科学 | 6368篇 |
皮肤病学 | 1317篇 |
神经病学 | 2451篇 |
特种医学 | 2246篇 |
外国民族医学 | 1篇 |
外科学 | 4138篇 |
综合类 | 172篇 |
一般理论 | 5篇 |
预防医学 | 1587篇 |
眼科学 | 584篇 |
药学 | 3351篇 |
中国医学 | 445篇 |
肿瘤学 | 2673篇 |
出版年
2024年 | 23篇 |
2023年 | 245篇 |
2022年 | 771篇 |
2021年 | 1237篇 |
2020年 | 560篇 |
2019年 | 801篇 |
2018年 | 976篇 |
2017年 | 799篇 |
2016年 | 1154篇 |
2015年 | 1533篇 |
2014年 | 1805篇 |
2013年 | 2068篇 |
2012年 | 3079篇 |
2011年 | 3018篇 |
2010年 | 1730篇 |
2009年 | 1518篇 |
2008年 | 2093篇 |
2007年 | 1927篇 |
2006年 | 1690篇 |
2005年 | 1565篇 |
2004年 | 1203篇 |
2003年 | 1057篇 |
2002年 | 898篇 |
2001年 | 788篇 |
2000年 | 724篇 |
1999年 | 514篇 |
1998年 | 209篇 |
1997年 | 135篇 |
1996年 | 118篇 |
1995年 | 81篇 |
1994年 | 98篇 |
1993年 | 81篇 |
1992年 | 148篇 |
1991年 | 155篇 |
1990年 | 171篇 |
1989年 | 137篇 |
1988年 | 122篇 |
1987年 | 110篇 |
1986年 | 94篇 |
1985年 | 64篇 |
1984年 | 43篇 |
1983年 | 38篇 |
1982年 | 28篇 |
1981年 | 36篇 |
1979年 | 23篇 |
1978年 | 22篇 |
1977年 | 23篇 |
1975年 | 18篇 |
1974年 | 17篇 |
1970年 | 23篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
881.
Gun Yoon Hyun-Soo Kim Yoo-Young Lee Tae-Joong Kim Chel Hun Choi Sang Yong Song Byoung-Gie Kim Duk-Soo Bae Jeong-Won Lee 《International journal of clinical and experimental pathology》2015,8(5):5688-5694
Adenoid cystic carcinoma of Bartholin glands (BG-ACC) is a rare, slow-growing but a highly aggressive tumor with remarkable capacity for local recurrence and distant metastasis. The purpose of this study was to elucidate our experiences of the diagnosis and treatment of BG-ACC and to analyze the clinical outcomes and prognosis of patients with BG-ACC. A retrospective chart review was performed to assess the demographic information, chief complaints, pathologic features of tumors, primary treatment, and development of local recurrence or distant metastasis, as well as the patient outcome. All patients received surgical excision as the primary treatment, and the diagnosis of BG-ACC was confirmed histopathologically. Three of four patients whose tumors showed pathologic features indicating a high probability of recurrence received adjuvant radiotherapy. These patients did not develop local recurrence, in contrast, one patient who did not receive adjuvant radiotherapy developed local recurrence and distant metastasis on several occasions. All patients who received primary surgical treatment are alive to date. When patients who are more than 40 years of age and who present with symptomatic BG lesions, BG-ACC should be included in the differential diagnosis and biopsy should be performed for histopathologic confirmation. Radical local excision with sufficient negative margins seems to be beneficial for primary treatment. Adjuvant radiotherapy is a reasonable treatment option for patients with high risk factors after surgery or for patients who develop local recurrence. 相似文献
882.
[Purpose] The purpose of this study was to investigate the effects of the speed of squat
exercises on paretic lower extremity muscle activity in patients with hemiplegia following
a stroke. [Subjects and Methods] Ten stroke patients performed fast and slow squat
exercises for 2 seconds and 8 seconds, respectively. The muscle activities of the paretic
and non-paretic sides of the rectus femoris muscle, the biceps femoris muscle, and the
tibialis anterior muscle were assessed and compared using surface electromyography.
[Results] The paretic side of the rectus femoris muscle showed statistically significant
differences in the fast squat exercise group, which demonstrated the highest muscle
activity during the rapid return to the upright position. [Conclusion] The rectus femoris
muscle showed the highest muscle activity during the return to the upright position during
the fast squat exercise, which indicates that the rectus femoris muscle is highly active
during the fast squat exercise.Key words: Fast and slow squat exercise, Muscle activity, Chronic strokes 相似文献
883.
[Purpose] This study examined the effect of low intensity exercise on bone density by
conducting trunk stabilization exercise on females after menopause for 24 weeks. [Subjects
and Methods] Thirty three female subjects over 47 years old and under the age of 53 were
selected and 16 for experimental group and 17 for control group were randomly selected.
Experimental group had performed spinal and pelvic stabilization exercise 30 minutes a
day, 5times a week, for 24 weeks. Except for the daily life, control group did not
participate in any characteristic movement. Bone density of every member in experimental
group was measured using average value of bone density of 1st–4th lumbar through
quantitative computer tomography. [Results] There was a meaningful difference in only
control group about measured value of bone density within each group, experimental and
control group, but there was no meaningful difference in measured value of bone density
between two groups, experimental group and control group. [Conclusion] Through this
research, we could see the fact that although trunk stability exercise could not change
bone density meaningfully, it could maintain bone density. In the future, it is randomly
necessary to study things related this because results of researches can show different
results according to exercise intensity, exercise period, age, weight, hormone status and
mediation period. It is considered that it will help to prevent and treat patients with
osteoporosis a lot.Key words: Bone mineral density, Computer tomography, Low intensity exercise 相似文献
884.
Munsang Choi Junsang Yoo Soonyoung Shin Wanhee Lee 《Journal of Physical Therapy Science》2015,27(6):1861-1864
[Purpose] This study investigated the effect of stepper exercise with visual feedback on
strength, walking, and stair climbing in stroke patients. [Subjects] Twenty-six stroke
patients were divided randomly into the stepper exercise with visual feedback group (n =
13) or the stepper exercise group (n = 13). [Methods] Subjects in the experimental group
received feedback through the mirror during exercise, while those in the control group
performed the exercise without visual feedback; both groups exercised for the 30 min
thrice per week for 6 weeks. The hip extensor and knee extensor strength, 10-m walking
test results, and 11-step stair climbing test results were evaluated before and after the
intervention. [Results] The stepper exercise with visual feedback group showed
significantly greater improvement for hip extensor strength and the 10-m walking test. The
knee extensor strength and 11-step stair climbing in both groups showed significantly
greater improvement after the intervention, but without any significant difference between
groups. [Conclusion] The findings of this study indicate that the stepper exercise with
visual feedback can help improve the strength of the hip extensor and the 10-m walking
test; the stepper exercise alone may also improve the knee extensor strength and stair
climbing ability.Key words: Stroke, Stairs, Visual feedback 相似文献
885.
[Purpose] The purpose of this study was to compare shoulder stabilization muscle
activities according to postural changes during flexi-bar exercise. [Subjects] The
subjects included 18 students (10 males, 8 females) at B University. [Methods] The
subjects performed the following flexi-bar exercises: 1) medio-lateral oscillation with
the 90° shoulder abduction, with the hand in the neutral position; 2) dorso-ventral
oscillation with 90° shoulder flexion, with the hand in the neutral position; 3)
superior-inferior oscillation with 90° shoulder flexion, with the 80° hand pronation.
[Results] The activity of the serratus anterior showed significant differences between
each position; however, activities of the upper trapezius and middle trapezius were not
significantly different. [Conclusion] The results of this study indicate that posture
control is important for selective strengthening of the serratus anterior muscle during
flexi-bar exercises.Key words: Flexi-bar exercise, Shoulder stabilization, Muscle activity 相似文献
886.
Acceleration of Bone Regeneration by BMP‐2‐Loaded Collagenated Biphasic Calcium Phosphate in Rabbit Sinus
下载免费PDF全文
![点击此处可从《Clinical implant dentistry and related research》网站下载免费的PDF全文](/ch/ext_images/free.gif)
887.
888.
889.
C. H. Park K. O. Kim I. H. Baek M. H. Choi H. J. Jang S. H. Kae J. B. Kim G. H. Baik W. G. Shin K. H. Kim H. Y. Kim 《Diseases of the esophagus》2014,27(2):116-121
The prevalence of gastroesophageal reflux disease in Korea has been believed to be low, but the incidence of gastroesophageal reflux disease in Korea is expected to increase because of the longer life expectancy and more ingestion of westernized food. The aim of this study was to report differences in the risk factors of reflux esophagitis (RE) according to age in Korea. We prospectively recruited the subjects who had RE among those who visited a health promotion center for upper gastrointestinal cancer surveillance at Hallym Medical Center (five institutions) between January 2008 and February 2009. The enrolled study participants comprised 742 subjects with RE and 1484 healthy controls. The independent risk factors of RE in young and adult group were male sex, smoking, coffee, body mass index ≥ 25, hiatal hernia, and Helicobacter pylori negativity. The risk factors of RE in elderly group were smoking, coffee, and hiatal hernia. The risk factors for RE according to age group were found to differ. In elderly group, Helicobacter pylori infection was not a significant protective factor contrary to young and adult groups. 相似文献
890.